Question: How to renew certificate for Exchange Server? Answer: 1. get-ExchangeCertificate | fl * to determine the thumbprint for the certificate 2. get-ExhcangeCertificate -thumbprint <thumbprint> | new-exchangecertificate. 3. Enable service on the new certificate. Enable-ExchangeCertificate -thumbprint "thumbprint" -services xx,xx,xx,xx More information: Understanding the Self-Signed Certificate in Exchange 2007 http://technet.microsoft.com/en-us/library/bb851554(EXCHG.80).aspx Applies to: Microsoft Exchange Server 2007