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I would use a 3rd party, such as Comodo. &nbsp;The following is an article on this subject with other useful links. &nbsp;Just pay attention to the Exchange server. &nbsp;This is relevant for 2007, which I don't see that you specified your Exchange version.<br />
<br />
<a href="http://support.microsoft.com/kb/929395" rel="ugc nofollow">http://support.microsoft.com/kb/929395</a><br />
<br />
From my experience, you need to have a Unified Communications Certificate. &nbsp;If you don't, then you will have issues with Autodiscover.
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I would use a 3rd party, such as Comodo.  The following is an article on this subject with other useful links.  Just pay attention to the Exchange server.  This is relevant for 2007, which I don't see that you specified your Exchange version.

http://support.microsoft.com/kb/929395 [http://support.microsoft.com/kb/929395]

From my experience, you need to have a Unified Communications Certificate.  If you don't, then you will have issues with Autodiscover.

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Hi Everyone,<br />
<br />
I'm setting up access for our users to access their corporate when they're traveling, through Web Outlook in Windows 2003 SBS's Remote Workspace. &nbsp;I'd like to set up a security certificates system for it. &nbsp;Can I use Windows 2003 's Certificate Server? &nbsp;Or do I need to subscribe to a 3rd party (and if so, any good recommendations)? &nbsp;Are these 2 even the same category?<br />
<br />
Any assistance is appreciated.<br />
<br />
Thanks in advance,<br />
<br />
Theodosios
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Hi Everyone,

I'm setting up access for our users to access their corporate when they're traveling, through Web Outlook in Windows 2003 SBS's Remote Workspace.  I'd like to set up a security certificates system for it.  Can I use Windows 2003 's Certificate Server?  Or do I need to subscribe to a 3rd party (and if so, any good recommendations)?  Are these 2 even the same category?

Any assistance is appreciated.

Thanks in advance,

Theodosios

Setting up a Certificate Authority

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

Small Business Server (SBS) is a line of server operating systems targeted at small businesses by bundling the operating system with a number of other Microsoft products that would normally need to be purchased or licensed separately. The most notable inclusions are Exchange, SQL Server, SharePoint and ISA/TMG (Microsoft's firewall and proxy server).

Microsoft Forefront, formerly known as Internet Security and Acceleration Server (ISA Server), is a network router, firewall, antivirus program, VPN server and web cache that runs on Windows servers. It includes identity management and protection systems, and discontinued systems for threat management and network protection, along with protection for Sharepoint and Exchange. The scope of discussions includes forward and reverse proxy, application and service publishing, virtual private networks (VPNs), outbound access rules, SSL certificates and network routing within either a single node or an highly-available array pairing.