I purchased a single domain cert though Godaddy and imported it into Exhange 2010 without a problem. At that time, I had a self signed certificate previously installed but I have since deleted that. I am trying to replace the cert with a multiple domain cert from Godaddy but I get the error message: "Cannot import certifiate. A certificate witht he thumbprint already exists". I have tried manually removing the previous cert though the MMC and with EMS with no luck. Any suggestions for me anyone?