Hello,I am having a problem with a certificate that is expired. When I open an outlook 2007 client that is connected to exchange 2007 SP1, I get a message that the certificate is expired. I can choose yes to continue but I get the message everytime the clients restarts outlook.Can someone provide me with the steps to renew the certificate ?Best regards,Mark

Hi,Sorry for the delayed reaction :)It is a self-certificate.I tried the suggestion but when I trie the get-exchangecertificate I get an error messag :Get-EchangeCertificate : This operation cna only performed locally on a Microsoft Exchange server that has the Edge Transport, Hub Transport, Client Access, or Unified Messaging server role installed. Please log on locally to a Microsoft Exchange server that has one of the supported server roles installed and perform this operation again.Op regel:1 tekens : 24What can I doing wrong ?Best regards,Mark