How to limit access to Exchange 2003 Mobile Actviesync server by user?

Posted by micilin on Server Fault See other posts from Server Fault or by micilin
Published on 2010-03-24T16:03:12Z Indexed on 2010/03/24 16:13 UTC
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So I was asked to set up an Exchange Activesync mobile gateway. That's done. It's a separat eExchange 2003 front-end server configured for SSL, and I've put an off-domain ISA server in front of it. Now I'm being asked to limit which users can connect to it.

By default an Exchange front-end server allows any user who has a mail account to connect to the front -end server. So I'm looking at the permissions on the various IIS sites/apps on the server, but I know that it's easy to break Exchange Front-end server perms.

So I've got the following in IIS:
Exadmin
Exchange
EchWeb
Microsoft-SErver-ActiveSync
MobileAdmin
OMA

And a couple of others that I dont think are relevant.

Can I change the permissions on one of these to restrict who can connect to Activesync?

As a bonus: Can I do it in a way that does not affect ordinary browser based Exchange Access?

Thanks in Advance!!

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