Hi,
You caused that problem when you hardcoded the Outlookprovider and left msstd: out.
(Yes, I read your other
thread)
Btw, Why did you hardcode EXPR.
Don't you have mail.mydomain.com as the first SAN Name in your certificate? If not, then I can understand why. You really should at least remove the hardcoded EXCH.
Martina Miskovic