Welcome to Marc Grote's Section

Marc Grote's Latest Contributions

Hardening Exchange Server 2007 - Part 3: Securing Email Client Access

Date - Feb 05, 2008

Section - Exchange 2007 Articles / Security & Message Hygiene

How to secure client access from OWA, POP3/IMAP4 and Outlook Anywhere.

Hardening Exchange Server 2007 - Part 2: Secure by Default

Date - Jan 03, 2008

Section - Exchange 2007 Articles / Security & Message Hygiene

How Exchange Server 2007 is “secure by default” and what other products to use to further harden it.

Hardening Exchange Server 2007 - Part 1: Introductory Steps

Date - Dec 11, 2007

Section - Exchange 2007 Articles / Security & Message Hygiene

How to harden an Exchange Server 2007 environment with SP1 (Beta), installed on Windows Server 2008 (Beta).

Exchange Server 2007 Edge Server Backup and Cloning

Date - Oct 30, 2007

Section - Exchange 2007 Articles / High Availability & Recovery

How to back up the Exchange Server 2007 Edge Transport Server role with NTBACKUP and other techniques, and how to use Edge cloning to clone an Edge Server configuration.

How Exchange Server 2007 Extends the Active Directory Schema

Date - Oct 02, 2007

Section - Exchange 2007 Articles / Planning & Architecture

How the Exchange Server 2007 setup extends the Active Directory and why these Schema changes are important.

Configuring Outlook 2007 with Exchange Server 2007

Date - Aug 28, 2007

Section - Exchange 2007 Articles / Management & Administration

How to configure Outlook 2007 with Exchange Server 2007.

Exchange 2007 SMTP Namespace Sharing and Different Relay Domain Types

Date - Aug 07, 2007

Section - Exchange 2007 Articles / Planning & Architecture

How to share your Exchange Server 2007 SMTP namespace with another messaging system and how to create internal and external mail relay domains.

How the Exchange Server 2007 Core Services Work Together

Date - Jul 24, 2007

Section - Exchange 2007 Articles / Planning & Architecture

How the new Exchange Server 2007 core services interact with other Exchange and related Windows services and which services from Exchange Server 2003 are obsolete in Exchange Server 2007.

Exchange 2007 Message Size Limits

Date - Jul 10, 2007

Section - Exchange 2007 Articles / Management & Administration

How to set size limits for messages in Exchange Server 2007

How to use the Exchange 2007/2003 Address Rewrite Feature

Date - May 24, 2007

Section - Exchange 2007 Articles / Compliance, Policies & Archiving

Why the Exchange Address Rewrite feature might be necessary in your Exchange Server environments.

Exchange 2003 System Mailboxes

Date - May 10, 2007

Section - Exchange 2003 Articles / Management & Administration

Overview of Exchange Server 2003 System mailboxes.

Securing SMTP Message Flow between different Exchange Server 2007 organizations

Date - Apr 05, 2007

Section - Exchange 2007 Articles / Security & Message Hygiene

How to secure SMTP message flow between Exchange Server 2007 in different Exchange organizations.

Implementing Exchange Server 2007 for coexistence with Exchange Server 2003

Date - Feb 20, 2007

Section - Exchange 2007 Articles / Migration & Deployment

How Exchange Server 2007 can coexist with Exchange Server 2003 and their main differences.

Microsoft Exchange Load Generator

Date - Jan 25, 2007

Section - Exchange 2003 Articles / Tools

How to use the Microsoft Exchange Server Load Generator to simulate multiple MAPI client requests against Exchange Server for testing purposes or Benchmarking.

Explaining Exchange Message formats

Date - Jan 11, 2007

Section - Exchange 2003 Articles / Management & Administration

How to configure Message formats on Exchange for interoperability with other messaging systems or mail clients.

Implementing Custom Recipient Policies

Date - Jan 04, 2007

Section - Exchange 2003 Articles / Management & Administration

What task the Recipient Update Service (RUS) has in an Exchange environment and how to implement custom Recipient Policies in Exchange 2003 with variables for the SMTP Prefix and how to Add/Remove/Change custom E-Mail Addresses with ADModify.NET.

Exchange 2003 SMTP Namespace Sharing

Date - Dec 12, 2006

Section - Exchange 2003 Articles / Management & Administration

How to share your Exchange Server 2003 SMTP Namespace with another Messaging System.

EXINFO tool

Date - Nov 28, 2006

Section - Exchange 2003 Articles / Tools

How to use the ExInfo tool to collect and display Exchange Server 2000 and Exchange Server 2003 information.

Exchange Troubleshooting Assistant

Date - Nov 14, 2006

Section - Exchange 2003 Articles / Tools

How to use the Exchange Server Troubleshooting Assistant version 1.0.

Publishing Exchange 2007 OWA with ISA Server 2006

Date - Oct 17, 2006

Section - Exchange 2007 Articles / Mobility & Client Access

This article shows how to publish Outlook Web Access in Exchange Server 2007 Beta 2 with the help of ISA Server 2006.

Outlook Anywhere 2007 with ISA Server 2006

Date - Oct 03, 2006

Section - Exchange 2007 Articles / Mobility & Client Access

This article shows you how to publish Outlook 2007 RPC over HTTPS with Exchange Server 2007 Beta 2 and ISA Server 2006.

Exchange Server 2003 Mailflow (Part 2) - Troubleshooting

Date - Sep 21, 2006

Section - Exchange 2003 Articles / Management & Administration

This article shows you how to troubleshoot message flow within the Exchange Organization.

Exchange Server 2003 Mailflow (Part 1)

Date - Sep 12, 2006

Section - Exchange 2003 Articles / Planning & Architecture

In this article I will show you how e-mail messages flow through Exchange Server 2003 for Intra-site and Inter-site Messaging.

Implementing RPC over HTTPS in a single Exchange Server 2003 environment

Date - Aug 29, 2006

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will show you how to deploy RPC over HTTPS to connect your Exchange Server with your Outlook Client over HTTPS. This article specifically deals with a single Exchange / Domain Controller environment for small organizations.

Creating a Virtual Exchange Server for Exchange 2003 Clustering

Date - Aug 22, 2006

Section - Exchange 2003 Articles / High Availability & Recovery

In this article I will show you the detailed steps that are necessary to create an Exchange Virtual Server for Exchange Server Clustering with Windows Server 2003.

Securing E-Mails with S/MIME and Smartcards in Exchange 2003

Date - Jul 11, 2006

Section - Exchange 2003 Articles / Security & Message Hygiene

In this article I will give you a high level overview of the necessary steps to secure E-Mails with Outlook 2003 and Smartcards.

Exchange Server 2003 and the Device Emulator 1.0 with MSFP

Date - Jun 27, 2006

Section - Exchange 2003 Articles / Mobility & Client Access

In this article I will show you how to simulate a Smartphone or another mobile device with MSFP (Microsoft Security Feature Pack) with the help of the Device Emulator 1.0 with MSFP to test and simulate the new Direct Push and Security features of Microsoft Exchange Server 2003 Service Pack 2.

Exchange Internals – How the Exchange Core Components work together

Date - Jun 15, 2006

Section - Exchange 2003 Articles / Planning & Architecture

In this article I will show you the Basic core services in Exchange Server 2003 and how they work together.

Using the Logparser Utility to Analyze Exchange/IIS Logs

Date - Jun 08, 2006

Section - Exchange 2003 Articles / Tools

In this article I will show you how to use the Microsoft Logparser Utility to analyze Microsoft Exchange Server/IIS log files.

Explaining the Exchange 2007 Toolbox

Date - May 09, 2006

Section - Exchange 2007 Articles / Tools

In this article I will give you some information about the Exchange Server 2007 Toolbox.

Understanding and using the External Associated Account in Windows Server 2003 and Exchange 2003

Date - Feb 28, 2006

Section - Exchange 2003 Articles / Management & Administration

In this article I will give you some information about the External associated Account in Windows Server 2003 and how to use it.

How to change the POP3 / IMAP4 and SMTP banner in Exchange 2003

Date - Feb 02, 2006

Section - Exchange 2003 Articles / Management & Administration

In this article I will show you how to change the banner for the POP3/IMAP4 and SMTP service in Exchange 2003. Changing the banner for these Exchange services enhances the security if an attacker and illegitimate users don't know, on the first try, which server is communicating with them. Please keep in mind that this is only one of several methods of securing the Exchange environment.

Understanding the LegacyExchangeDN

Date - Jan 24, 2006

Section - Exchange 2003 Articles / Planning & Architecture

In this article I will discuss the LegacyExchangeDN and how to use the free LegacyExchangeDN tool from the Microsoft website.

Understanding Mailbox Enabled and Mail Enabled Recipients in Exchange 2003

Date - Dec 27, 2005

Section - Exchange 2003 Articles / Management & Administration

In this article I will show you the differences between mailbox enabled and mail enabled recipients in Exchange 2003 and how to use them.

Exchange 2003 – Performance Troubleshooting Analyzer Tool v1.0 (ExPTA)

Date - Dec 06, 2005

Section - Exchange 2003 Articles / Tools

In this article I will show you how to use the new Exchange Server 2003 Performance Troubleshooting Analyzer Tool (ExPTA).

Exchange 2003 - Disaster Recovery Analyzer Tool (ExDRA 1.0)

Date - Nov 17, 2005

Section - Exchange 2003 Articles / Tools

In this article I will show you how to use the new Exchange Server 2003 Disaster Recovery Analyzer Tool (ExDRA).

Exchange 2003 Message Tracking and Logging

Date - Nov 10, 2005

Section - Exchange 2003 Articles / Monitoring & Operations

In this article I will show you how to enable Message Tracking and Logging of Messages in Exchange Server 2003.

Offline Address Book - Best Practice

Date - Oct 27, 2005

Section - Exchange 2003 Articles / Management & Administration

In this article I will give you some tips how to implement Offline Address Books in Exchange Server 2003. This article deals also with some basics about Offline Address Books and the implementation of Offline Address Books in Outlook 2003.

Using the Exchange Dump Utility (ExchDump)

Date - Oct 18, 2005

Section - Exchange 2003 Articles / Tools

In this article I will give you some information about the small but very helpful tool ExchDump. With the help of ExchDump you can collect a lot of useful information about your Exchange Servers.

A First Look at Exchange 2003 SP2

Date - Aug 24, 2005

Section - Exchange 2003 Articles / Planning & Architecture

In this article I will give you some information about Exchange Server 2003 SP2 and some useful enhancements.

Implementing iSCSI for Exchange Server 2003

Date - Aug 09, 2005

Section - Exchange 2003 Articles / Planning & Architecture

In this article, I will show you how to move your Exchange Server 2003 databases to new disk space on a file server on which storage is published over iSCSI.

Key Archiving and Recovery

Date - Jun 30, 2005

Section - Exchange 2003 Articles / High Availability & Recovery

In this article I will show you how to setup a Windows 2003 Enterprise CA for archiving and recovering keys for e-mail encryption.

How to Set Size Limits for Messages

Date - Jun 16, 2005

Section - Exchange 2003 Articles / Management & Administration

In this article I will show you how to set size limits for messages in Exchange Server 2003.

Exchange 2003 Backup and Restore with NTBACKUP

Date - May 17, 2005

Section - Exchange 2003 Articles / High Availability & Recovery

In this article I will show you how to Backup and Restore your Exchange Server databases with the help of the built-in NTBACKUP from Windows 2003. I will show you the simplest form of Exchange Backup and Restore. For complete Exchange Server Backup and Recovery follow the links at the end of this article.

How to Automate the Exchange Server 2003 Installation

Date - Apr 26, 2005

Section - Exchange 2003 Articles / Migration & Deployment

In this article, I will show you how to automate the Exchange 2003 installation process with the help of an unattended script.

Implementing Exchange 2003 Message Journaling

Date - Apr 14, 2005

Section - Exchange 2003 Articles / Management & Administration

Exchange 2003 provides a native Journaling feature which allows you to archive all incoming and outgoing e-mails for a specific mailbox store. Beginning with Exchange 2003 SP1 you can download EXEJCFG.EXE from the Exchange 2003 download site. EXEJCFG enhances the current Exchange archiving features to capture recipients on distribution lists, BCC recipients and other message details. In this article I will show you how to implement Exchange 2003 Journaling for e-mails.

Using SMTPDIAG to Diagnose Exchange 2003 Related SMTP and DNS Problems

Date - Mar 10, 2005

Section - Exchange 2003 Articles / Tools

In this article I will give you some information about how to use SMTPDiag. SMTPDiag is a diagnostic tool that is used to determine if Simple Mail Transfer Protocol (SMTP) and Domain Name System (DNS) are configured to reliably deliver mail to an external e-mail address.

Using the Exchange tools ISINTEG and ESEUTIL to Ensure the Health of your Information Store

Date - Feb 24, 2005

Section - Exchange 2003 Articles / Tools

In this article I will give you some information on how to use the Exchange tools ISINTEG and ESEUTIL. With the help of ESEUTIL you can defragment your Exchange information store offline, check the integrity of the store and repair the information store in case of emergency. ISINTEG is used to perform some tests on the information stores and to fix some errors.

Command Line Administration of your Exchange Full-Text Index with the help of MSSEARCH_ADMIN.VBS

Date - Jan 25, 2005

Section - Exchange 2003 Articles / Management & Administration

In this article, I will show you how to administer the Full-Text index with a new command line tool – called MSSEARCH_ADMIN.VBS. This tool greatly expands the administration capabilities with a lot of missing features in the GUI administration (Exchange System Manager). You can use MSSEARCH_ADMIN.VBS with Exchange 2000 and Exchange 2003.

Overview of the Exchange 2003 Resource Kit Tools

Date - Jan 18, 2005

Section - Exchange 2003 Articles / Tools

In this article I will give you an overview about the Exchange 2003 Resource Kit Utilities – called “All-in-One Exchange 2003 Tools” which you can download for free from the Microsoft Exchange website.

Using WinRoute to determine the Routing status of your Exchange organization

Date - Dec 07, 2004

Section - Exchange 2003 Articles / Tools

In this article I will give you some information about how to determine the Routing status of your Exchange organization with the help of the WinRoute tool. WinRoute is a Microsoft Exchange Server 2000/2003 tool that you can use to determine the link state routing (LST) information that is known to the routing group master. You can use this tool for troubleshooting Message Routing in Exchange 200x environments.

Implementing a Two Node Cluster with Windows 2003 Enterprise

Date - Nov 23, 2004

Section - Exchange 2003 Articles / High Availability & Recovery

In this article I will give you a high level overview about the installation of Exchange 2003 on a Windows 2003 two node Cluster. This article doesn’t explain every necessary step for clustering Exchange, but it should give you an overview about the installation process and some basic handling.

Using the Exchange Migration Wizard

Date - Nov 18, 2004

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will give you an overview of the Exchange 2003 Migration Wizard (MAILMIG.EXE). With the help of the Migration Wizard you can simply migrate from a foreign messaging system or older Exchange versions to Exchange 2003. The wizard can help you to migrate from: Migration Files, MS Mail for PC Networks, cc:Mail, Exchange 5.5, Lotus Notes, Novell GroupWise 4.x, Novell GroupWise 5.x, Internet Directory (LDAP via ADSI) and, Internet Mail (IMAP4).

User, groups, distribution list and contact management with Windows 2003 Active Directory

Date - Nov 09, 2004

Section - Exchange 2003 Articles / Management & Administration

In this article I will give you a detailed Step by Step solution how to create mailbox enabled users, mail enabled users, contacts and distribution list.

How to add SPF support to your Exchange Server

Date - Nov 02, 2004

Section - Exchange 2003 Articles / Security & Message Hygiene

SPF (Sender Policy Framework) makes it easy to counter most forged "From" addresses in email, and thus helps to counter e-mail spam. GFI is offering an SPF module as freeware. In this article I will give you some information about the newest version of GFI MailEssentials 10.1 and how to setup the software with SPF integration.

How to completely remove a Exchange server or the entire Exchange organization

Date - Oct 19, 2004

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will give you a detailed overview of: How to remove Exchange Server 2003 from your computer; How to Remove the First Exchange 2003 Server Computer from the Site; and How to completely remove Exchange 2003 from Active Directory.

Forestprep and Domainprep Explained in Detail

Date - Oct 07, 2004

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will give you a detailed overview of the Microsoft Exchange Forestprep and Domainprep process.

An Overview of the Sender Policy Framework

Date - Sep 30, 2004

Section - Exchange 2003 Articles / Security & Message Hygiene

In this article I will give you some information about SPF – Sender Policy Framework and its implementation. Some statistics state that nearly 75% of all e-mail traffic is Spam, sometimes called UCE (Unsolicited Commercial Email). To help against this threat, several vendors are developing solutions against Spam. One solution is SPF. What is SPF? SPF is a solution to fight against email address forgery. SPF makes it easier to identify spam mails, viruses and worms.

Overview of the ADC (Active Directory Connector)

Date - Sep 16, 2004

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will give you an overview of the Microsoft Active Directory Connector (ADC). I will give you some background information about the ADC and its functions.

Mailbox Management

Date - Aug 24, 2004

Section - Exchange 2003 Articles / Management & Administration

In this article I will give you an overview of Exchange 2003 Mailbox Management. We will cover the following topics: Mailbox creation, Recipient Policies, Mailbox Management, and Mailbox Recovery.

Domain Rename – Rename a Windows 2003 Forest with Exchange 2003 installed

Date - Aug 17, 2004

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will give you a Step by Step solution how to rename a Windows 2003 domain with Exchange 2003 installed. This article will not explain every step how to do a domain rename. This is documented in the “Step-by-Step Guide to Implementing Domain Rename“. You will find the link at the end of this article. The Windows Server 2003 Active Directory Domain Rename Tool provides a supported methodology to rename one or more domains in an Active Directory forest. The DNS name and the NetBIOS name of a domain can be changed using the domain rename procedure. Note that implementing domain rename is a complex undertaking that requires thorough planning and a good understanding of the domain rename procedure.

Administering Public Folders with Exchange 2003 and PFMIGRATE

Date - Aug 05, 2004

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will give you an overview about basic Public Folder Administration Tasks with Exchange 2003 and the use of tools like PFMIGRATE.

Using Telnet to connect to Exchange 2003 POP3 mailboxes and using SMTP to send e-mail for troubleshooting purposes

Date - Jul 29, 2004

Section - Exchange 2003 Articles / Management & Administration

In this article I will give you tips for troubleshooting Exchange 2003 POP3 access and SMTP E-Mail transfer using the good old Telnet client. Why am I writing an article about POP3 and SMTP troubleshooting with the help of Telnet? Telnet gives you some powerful information about every connection step for POP3 or SMTP processes.

Site Consolidation Tools for Exchange Server 2003

Date - Jul 22, 2004

Section - Exchange 2003 Articles / Migration & Deployment

In this article I will give you a step by step solution to deploy the Site Consolidation Tools for Exchange 2003 in Mixed Mode. Have you ever tried to move a Mailbox between different administrative Groups in Exchange 2003 Mixed Mode? – It doesn’t work. What do you do when you are deploying an Upgrade from Exchange 5.5 to Exchange 2003? What do you do with the Outlook Profiles? How can you update these settings to reflect the new Server? The answer is easy. Install Exchange 2003 SP1 and the updated version of the Exchange 2003 Deployment Tools and life will go easier. You will see this later in this article.

Configuring the InterOrg Replication Tool

Date - Jul 15, 2004

Section - Exchange 2003 Articles / Migration & Deployment

The Inter-Organization Replication tool was initially released as part of Microsoft Exchange Server 5.5 SP3, with an Update for Microsoft Exchange Server 2003. This tool is used to replicate public folder content and free and busy information between different Exchange organizations. It allows the coordination of meetings, appointments and contacts. In this article I will give you a step by step solution to setup an InterOrg Replication between two different Exchange 2003 Organizations.

GAL Sync with the Identity Integration Feature Pack (IIFP)

Date - Jul 08, 2004

Section - Exchange 2003 Articles / Migration & Deployment

The Windows 2003 Forest is the logical boundary of Exchange 2003. Microsoft recommends deploying only one Active Directory Forest whenever possible. There are many reasons for single forest deployment beginning with the administrative overhead through the need to synchronize the Global Address Lists of Exchange 2003 between two forests to provide a central GAL. But what if you have more than one forest with Exchange 2003 (through a merger or acquisition)? In this article I will explain in high level steps how to synchronize the GALs (Global Access Lists) of two Exchange 2003 organizations with the help of IIFP. This article should give you an overview about this complex process.

Configuring an SMTP Connector

Date - Jun 30, 2004

Section - Exchange 2003 Articles / Management & Administration

You can configure an SMTP Connector to connect your Exchange Organization with the Internet or with another organization using SMTP as a transport protocol. This article explains in detail how to configure an SMTP Connector in Exchange 2003.

Status Monitoring

Date - Jun 08, 2004

Section - Exchange 2003 Articles / Monitoring & Operations

Exchange 2003 Standard and Enterprise offers the feature to monitor the Server status of the Exchange Servers in your Enterprise. If some of the monitored services and other Resources (RAM, CPU, Services) are in “Warning state” or “Critical State” you receive a status E-Mail or a customized action provided by a script notification. This article explains in detailed steps how to configure Monitoring and E-Mail notification.

Implementing a Full-Text Index for your Information Store

Date - May 21, 2004

Section - Exchange 2003 Articles / Management & Administration

Microsoft Exchange 2003 Server can create and manage full-text indexes for mailbox stores and public folders to provide users to search in message or public folder contents. With the help of full-text indexing, the content in an exchange database is indexed with the result of faster content searching. This article gives you best practices for deploying full-text indexing with Exchange 2003 Server.

Using the Exchange 2003 Mail Wizard

Date - May 11, 2004

Section - Exchange 2003 Articles / Management & Administration

“I will be back” – said Arnold Schwarzenegger in Terminator I – This is true for the IMW (Internet Mail Wizard) in Exchange 2003. Available first in Exchange 5.5, left in Exchange 2000 and new in Exchange Server 2003. This article explains in detail how to use the Exchange 2003 Mail Wizard to configure Internet E-Mail Access for your organization.

Configuring Outlook 2003 for Offline Use with Exchange 2003

Date - Apr 19, 2004

Section - Exchange 2003 Articles / Management & Administration

When you use Outlook 2003 with Microsoft Exchange Server 2003, you can configure some folders in your mailbox for offline use, that is, you can use the contents of a folder without a Network connection. This article explains in detail how you can create, use, and synchronize offline folders.

Exchange 2000 Key Management Server Migration to a Windows 2003 CA

Date - Mar 29, 2004

Section - Exchange 2003 Articles / Migration & Deployment

Exchange 2003 uses the Windows Server 2003 PKI architecture to provide secure e-mail services for Exchange users. Exchange 2000 KMS is no longer supported. The Windows 2003 Enterprise CA provides central key archiving and recovery. This article explains in high level steps how to migrate an Exchange 2000 KMS database to a Windows Server 2003 CA.

Implementing System Policies in Exchange Server 2003

Date - Feb 24, 2004

Section - Exchange 2003 Articles / Security & Message Hygiene

An Exchange System policy provides a new way to apply common settings to servers, public folder stores and mailbox stores for all or selected objects in an Exchange administrative group. This article explains in detail how to implement a mailbox store policy.

Query-based Distribution Groups

Date - Jan 16, 2004

Section - Exchange 2003 Articles / Management & Administration

A query-based distribution group is a new additional type of distribution group in Exchange 2003. This new type of distribution group provides the same functionality as a standard distribution group; however, instead of specifying static user memberships, a query-based distribution group allows you to use an LDAP query to dynamically build membership in the distribution group (for example All employees with a special group membership). Using query-based distribution groups we can reduce the administration costs dramatically. However a Query-based Distribution Group needs more Server resources like CPU power and RAM.

Microsoft Live Communication Server (LCS)

Date - Dec 29, 2003

Section - Exchange 2003 Articles / Planning & Architecture

Microsoft Office Live Communications Server 2003 is a manageable and extensible instant messaging server (IMS) that provides a real-time collaboration solution. It enables corporations to reach, collaborate, and respond to information more quickly as compared to telephones and e-mail. In this article we'll walk you through the steps that are involved while installing and configuring the Live Communications Server.

Outlook Mobile Access (OMA) in Exchange Server 2003

Date - Dec 10, 2003

Section - Exchange 2003 Articles / Mobility & Client Access

Marc Grote presents his first article for MSExchange.org and we are pleased to welcome him on board. Exchange 2003 provides a new cool Feature called Outlook Mobile Access (OMA). OMA allows users to access Exchange data by using mobile devices. Exchange 2003 provides two services for mobile users: Microsoft Exchange ActiveSync and Microsoft Outlook Mobile Access. This article is based on Windows 2003 Enterprise Edition (Build 3790), Exchange 2003 Enterprise RTM and the Mobile Browser Simulator / Gateway from Nokia.