ActiveSync access without domain name in Logon

Thanks for the quick reply Michael.

I am not sure if the problem lies on the F5 or the Exchange side. The ActiveSync application is migrated from an ISA TMG solution. And it works fine there. The ISA TMG has a way of adding the domain name for configurations that doesn't send any domain information.

The users logged on correctly according to the session logs. But still they get the username/password prompt. I tried to move the Variable Assign action after AD Auth and before SSO credentials (So no AD query Action). According to the session log the username now becomes domainname\username and the user is authenticated. But no synchronization.

If I want to set a custom variable to domain/username and use that in the SSO Credential mapping, how and where do I do that?