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New certificate status is unknown on Exchange

Posted on 2011-09-29
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Last Modified: 2012-05-12
I just order a new certificate from Entrust for my exchange server and webmail to replace the expired one, I’m able to install and enabled for IMAP, POP, IIS and SMTP, but when I use outlook, it shows “The security certificate has expired or is not yet valid” and when I run Get- ExchangeCertificate it shows “Status : Unknown” on the new certificate.  It seems outlook still using the old cert. How can I change the status? Please help, thanks in advance.
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Question by:weikiiro
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6 Comments
 
LVL 3

Expert Comment

by:lmovalles
ID: 36816310
this means that Unknown   Exchange is unable to determine the type of certificate that is installed.
Please validate the certuficates have the private keys.

http://technet.microsoft.com/en-us/library/bb124424.aspx

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Expert Comment

by:Satya Pathak
ID: 36816977
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Author Comment

by:weikiiro
ID: 36817225
SatyaPathak, I reinstall the intermediate cert, now status is valid. But outllok still link to the old cert, how can I force outllok to switch to new cert? Thank you.
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Expert Comment

by:ash007
ID: 36818558
Are u getting any popup  for certificate mismatch in Outlook
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weikiiro earned 0 total points
ID: 36818638
I'm getting popup for certificate expried, outlook looks for my old cert.
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by:weikiiro
ID: 37233434
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