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Office 365 migration but users getting expired cert message

Posted on 2013-06-01
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Last Modified: 2013-06-20
Hello,

   We recently converted from an in-house exchange to office 365 and now users are seeing a prompt when they open Outlook for an expired security certificate from out exchange server with GoDaddy. We have the server removed from the network and it's still prompting, Office 365 is functioning fine, but I cannot figure out how to correct the certificate prompt issue. Any help would be greatly appreciated!
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Question by:Jharrisonsnbs
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Expert Comment

by:woolnoir
ID: 39213808
are your outlook installations pointing at O365 CAS directly now ? check in the account prefs. DO you have any autodiscovery DNS records on your internal DNS which point at the old server ? is anything using the same IP as the old server on your network atm ?
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Author Comment

by:Jharrisonsnbs
ID: 39216289
Woolnoir,

    Sorry, I'm not familiar with checking the CAS on their account prefs. Where would I go to verify that? I do see this autodiscover record in my DNS forward lookup zone. Should that CNAME record not be there now? No, nothing is using that same IP address atm.
autodiscover.PNG
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Expert Comment

by:Vasil Michev (MVP)
ID: 39217153
Did you actually uninstall the Exchange server? Is the SCP object removed? SCP is the first thing Outlook clients will look for, then comes autodiscover. You can either perform a 'Test E-mail autoconfig' test from Outlook and see if any reference to the old Exchange server comes up, ro force Outlook to only look for specific location. For more info you can refer to this article:

http://support.microsoft.com/kb/2212902
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Author Comment

by:Jharrisonsnbs
ID: 39222961
vasilcho,

No, exchange was never officially uninstalled, just stopped services.

I will go thru the article and see if I make any progress. Thank you!
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LVL 39

Expert Comment

by:Adam Brown
ID: 39224184
You may also want to try recreating a user's Email profile. That's usually a good idea to do when you migrate if you haven't already.
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Accepted Solution

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Jharrisonsnbs earned 0 total points
ID: 39250817
Finally got a solution. CA was installed on the DC for IIS and Email, which they weren't using. revoked the certs and uninstalled the services. The prompting stopped directly after that was removed.
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Author Closing Comment

by:Jharrisonsnbs
ID: 39261881
I found a CA on the DC
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