Exchange 2010: Renew an Exchange Certificate Self Signed Certificate

Look up outdated certificate:

Get-ExchangeCertificate | fl

This example renews the self-signed Exchange certificate by using its thumbprint to identify the certificate.

Get-ExchangeCertificate -Thumbprint ‘AD19B141228C7CF98B5F78DCED978B7C45E15434’ | New-ExchangeCertificate

Replace with your thumbprint from earlier command.