An internal transport certificate expired in Exchange

50 pts.
Tags:
Exchange Certificates
Microsoft Exchange 2007
Hi Guys having this kind of error when i check my exchange server can someone advise Warning Event Type: Warning Event Source: MSExchangeTransport Event Category: TransportService Event ID: 12017 Date: 10/29/2009 Time: 2:57:00 AM User: N/A Computer: exchange01 Description: An internal transport certificate will expire soon. Thumbprint:0AE0955375E0D506F9EDF30DBE5896CF2A310ADF, hours remaining: 744

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This is probably happening because it’s coming upto your Exchange Server’s 1 year anniversary. When Exchange 2007 first loads it installs it’s own self-signed certificate but I believe this only lasts one year, the idea being that most people replace it with one from a Certification Authority which lasts for longer. Anyhow, you can simply create a new certificate!

First open up the exchange shell and type the command Get-ExchangeCertificate | List

This will show the current certificate and you can see the expiry date of it

Create a new certificate with the command
New-ExchangeCertificate
It will prompt to overwrite SMTP, say Yes

Now if you run
Get-ExchangeCertificate | List
You will see both certificates listed. They each have a thumbprint which is their unique identifier.

You will also see that the old certificate is still being used for IIS.

Enable the new certificate for IIS with the command
Enable-ExchangeCertificate -Thumbprint (new certificate’s thumprint) -Service IIS

Now remove the old certificate
Remove-ExchangeCertificate -Thumbprint (old certificate’s thumbprint)

And you’re done

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