I'm upgrading our network from Exchange 2003 to Exchange 2010 and it's going swimmingly. Well it was, I've moved some users to the 2010 box with blackberries (iphones working fine) and I can't get it working with BIS (blackberry internet services)
Whatever settings I try I get a
An error occurred during email account validation. Please check your information and try again. If the error persists please contact your System Administrator.
I'm using http://mail.mydomain.com/owa url, which works fine and the authentication settings I'm trying (username / password) work fine in owa.
Close to the point of pulling my hair out on this issue, is there a way to find out what it's failing on? Have I missed something very simple?