Good morning,

I am supposed to change the internal Outlook Anywhere hostname for an Exchange installation:

recent internal hostname: webmail.contoso.com
future internal hostname: webmail.contoso.local

The external hostname for OA is not set, because OA should not be available from external. 

Now I made a test changing the internal hostname as follows:

• generate a new Exchange certificate with subject name "webmail.contoso.local"
• Set-OutlookAnywhere -InternalHostname webmail.contoso.local -InternalClientsRequireSSL:$True

Afterwards I made some tests on several clients:

• Windows 7: working fine, it takes some time but Outlook updates its profile to the new internal OA name and connects to the mailbox
• Windows XP: Outlook profile is not updated automatically, if I update it manually, Outlook hangs when starting and still tries to establish 1 connection to the old OA internal hostname

Does anyone of you have an idea how to solve this? I appreciate your suggestions, thank you very much. :-)

Sebastian

Hello,

Have you updated the host name on the certificate from webmail.contoso.com to webmail.contoso.local?

Run Connection Status on both Windows 7 and Windows XP and see if they connect to different DC. If so, check the DC replication issue.

Thanks,

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Hi Simon,

thanks for your suggestions. The certificate host name was updated to webmail.contoso.local before changing the OA hostname.

I also checked the connection status. The problem also occurs when the clients contact the same DC. For the DCs i checked the replication with repadmin and dcdiag an I cannot find any issues.

Thank you

Hi,

the problem was that Outlook 2007 on Windows XP did not automatically update the profile. So I put a GPO with the appropriate administrative template to set the OA hostname, after this it works now!

Sebastian

• Marked as answer by Sebastian Maas 20 hours 19 minutes ago