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The Exchange Certificate will expire warning

Posted on 2012-04-11
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Last Modified: 2012-04-12
On reboot of my server in the application log I get the following warning from the Source MSExchange Web Services.

The exchange certificate
cn=ServerA.domain

Issuer
cn=ServerA.domain


Serial number
###

Not Before
Install date of server

Not After
1 year from install date of server

Thumbprint
####

will expire on  (1 year from install date of server).

This certificate was issued by this server.  When a Get-ExchangeCertificate command is run I do not see the above listed certificate. When I check the EMC I see two certificates one issued by digicert and one issued by "Federation"; neither of which have that expiration date.  Where else can I find this certificate that is giving the error?
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Question by:TuscarawasCountyAdmin
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Expert Comment

by:isaman07
ID: 37833476
Launch internet explorer on your exchange server, tools---> internet options--->Content--->certificates
Check under trusted root certification authority and intermediate if you can find it. If the issuer is your exchange server itself you can safely delete that certificate, since your exchange already has other valid certificates used by IIS.
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Author Comment

by:TuscarawasCountyAdmin
ID: 37834037
Sorry, I forgot to state that I had already done that also and there is nothing listed with the same expriation date or even close to it.
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Expert Comment

by:isaman07
ID: 37834369
Check if there are any certificates applied by a GPO in active directory.
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Author Comment

by:TuscarawasCountyAdmin
ID: 37834393
There are none.
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Accepted Solution

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isaman07 earned 500 total points
ID: 37834553
Did you check any sub site under IIS using the mentioned certificate?
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Author Comment

by:TuscarawasCountyAdmin
ID: 37837163
Ah ha!  I found the certificate in there.  It is labelled temp.  I also see the two other certificates, my cert issued by digicert and the one by federation.  Is it safe to delete this temp certificate?  It must have been created by the vendor when our exchange server was installed.
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Expert Comment

by:isaman07
ID: 37837755
Yes, it is safe, as long as you don't see it used in your EMC. But try to copy it just to be on the safe side.
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