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Outlook SSL Certificate warning

Posted on 2016-08-30
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Last Modified: 2016-09-04
Hi,

We just moved a client to Office 365 from GoDaddy POP email, so never had an Exchange server and no email certificates.  Now every time they open Outlook (various versions, happens to all) they get the SSL Certificate warning and you have to hit yes.  The warning was for a self-signed cert called Sites.  I have removed it/deleted it from the server and on a test machine, but it still pops up?  Does anyone know how to make it stop?

Thanks,
Rob
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Question by:fballatore
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Author Comment

by:fballatore
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Screen Shot1Screen Shot2
Here are the errors
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Expert Comment

by:-MAS
Comment Utility
Hi,
If you did a migration from Godaddy to Exchange online(Office365) you dont need a certificate.
You just make sure there is no HTTPS traffic scanning enabled in your firewall.
You can try testing https://testconnectivity.microsoft.com/  Office365 outlook connectivity.

Thanks
MAS
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Author Comment

by:fballatore
Comment Utility
Hi,

Not sure what you mean, I know I don't need a certificate, and the one that is popping up in that message has been completely removed from the server, so not sure why Outlook is still having it popup?
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Accepted Solution

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fballatore earned 0 total points
Comment Utility
I actually found a registry change to make to ignore the alert, so we are good now.
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Expert Comment

by:-MAS
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Please try to create a new outlook profile and let me know.

MAS
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Expert Comment

by:Todd Nelson
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fballatore,

Will you share the resolution you applied?
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Expert Comment

by:-MAS
Comment Utility
Appreciate if u share the solution.
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Author Closing Comment

by:fballatore
Comment Utility
I found the solution with a google search
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