Question : Error Code: 500 Internal Server Error. The target principal name is incorrect. (-2146893022) trying to access OWA on TMG/Exchange 2010

Our external domain name is different from our internal one. We ahve an internal Microosft CA and have issued a certificate and installed it on TMG. However, we get the error above when trying to access OWA from the outside. When we try to test the rule functionality on TMG 2010 we get the error below.

Category: Destination server certificate error
Error details: 0x80090322 - The target principal name is incorrect.

Please help

Answer : Error Code: 500 Internal Server Error. The target principal name is incorrect. (-2146893022) trying to access OWA on TMG/Exchange 2010

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