Exchange 2003 IMAP Configured for VPN Only

15 pts.
Tags:
IMAP
Mac OSX
Microsoft Exchange 2003
Microsoft Exchange migration
VPN
I have a Mac user that accesses our network via a VPN. He has Microsoft Outlook 2011 for Mac and cannot connect to Exchange 2003 as per the limitations set by Microsoft that are well documented at this point. Apparently, the only way to connect to Exchange 2003 via Outlook 2011 on a Mac is via IMAP. I do not plan to or want to set up IMAP on Exchange 2003 over the Intranet for security purposes. My question to you is this: Can I set up IMAP to only be available internally, within the network, and on therefore, on the VPN too? I'd have no problem setting up IMAP on Exchange 2003 INTERNALLY (VPN), which would then allow my remote Mac user to access Exchange on his computer. Is this possible, and if so, how? Thanks!

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You do not tell us about how do you publish your Exchange to the outside world.

Considering your security concerns which I subscribe entirely, I assume that you are using ISA server 2006 or TMG to publish your Exchange to the *World*.
These are *the best* way to secure your Exchange. (not only, bu also)

If this is correct, You can easily configure a publishing rule, to publish IMAP access, in a way that only internal or VPN.users can access it.

If you’re not using either of the above, we need to know how you are publishing you exchange installation or what are you using at the edge of your network.

As a last resort, you can always enable a firewall rule in your Exchange host to prevent access to IMAP from other that you LAN and/or VPN users.

HTH

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  • Techcastle
    ^^ above when I said "Intranet", I meant "Internet". Sorry about that.
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  • Techcastle
    [...] Exchange 2003 IMAP Configured for VPN Only [...]
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  • saturno
    That's ok. Everything I said before is completely valid even if meant Internet. For a *secure* publishing of any version of Exchange there is no better approach than MS ISA Server or it's successor TMG.
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