Can't access OWA via Exchange 2010 when connected via VPN

Posted on 2012-09-19
Last Modified: 2012-09-24
We used to have Exchange 2K3  that had OWA and users could access it when they were out of the office, after they connected via VPN.

We now have Exchange 2K10 and cannot access OWA via VPN. I am the new Sys Admin and was not here when EITHER set up was done. When a user tries to go to the URL for OWA, it is not resolved.

Any help would be greatly appreciated.
Question by:Gelly77
    LVL 35

    Expert Comment

    Can you resolve the owa name (the server name) using nslookup from the VPN client?
    Which one, the internal or external name?

    And the same clients can access the page when they are in the inernal network?

    Author Comment

    I can resolve the server name when connected to VPN. The name is the same for external and internal. Yes, the same clients can access the same page when on the internal network.
    LVL 35

    Accepted Solution

    So, when you can resolve the name via VPN can cann access the site from internal, would say, it maybe a router/proxy, firewall or virus scanner issue. Possibly your client does not regognize your VPN tunnel as domain network, so different rules may be applied.

    You may try to disable local firewall and virus scanners for testing, just to exclude them.

    Keep in mind, dependend from your VPN endpoint, that this device has to route you to the internal network. You may check, if there are limitations on that endpoint.
    Can you access other internal websites?

    And check your proxy settings in your brwoser. If a proxy is set, and not accessable via the VPN connetion,  the connection may fail.
    For testing, you may disable proxy, if enabled in the browser settings.

    Als VPN connection settings include "use default gateway of remote network" setting. This determines, if some calls go throught the vpn tunnel or directed to the internet.
    You may try tracert yourowaserver.domain.tld to see, how the request is routed.

    Author Comment

    It was a firewall issue. Thanks!

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