Doing an SBS 2008 to SBS 2011 (on-premise) migration this weekend, everything went very well except phone email. We're using a Trusted Public GeoTrust cert but its not a SAN cert, no autodetect etc... (worked fine with sbs 08) Windows phones and iPhones error 86000c09. I made sure the intermediate cert got installed and I tested it against GeoTrust website https://knowledge.geotrust.com/support/knowledge-base/index?page=content&id=SO9557&actp=LIST
Could that be it? I have to have this working by MOnday am, can anyone help???