CmdID / PowerShell / Cmdlets / Remove
Remove-ExchangeCertificate
Use the Remove-ExchangeCertificate cmdlet to remove existing Exchange certificates or pending certificate requests (also known as certificate signing requests or CSRs) from Exchange servers. Exchange PowerShell reference
From the Exchange PowerShell reference 6 parameters Its page in the reference
Parameters
-ThumbprintThe Thumbprint parameter specifies the certificate that you want to remove.-IdentityThe Identity parameter specifies the certificate that you want to remove.-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.-ServerThe Server parameter specifies the Exchange server where you want to run this command.-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.