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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
ID: 41776478
Screen Shot1Screen Shot2
Here are the errors
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Expert Comment

by:-MAS
ID: 41776668
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
ID: 41777105
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
ID: 41777133
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
ID: 41777135
Please try to create a new outlook profile and let me know.

MAS
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Expert Comment

by:Todd Nelson
ID: 41777136
fballatore,

Will you share the resolution you applied?
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Expert Comment

by:-MAS
ID: 41777139
Appreciate if u share the solution.
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Author Closing Comment

by:fballatore
ID: 41783536
I found the solution with a google search
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