SSO problems. External Authentication works, SSO does not
I configured my FileMaker Server 10 (on Small Business Server 2008) to allow login via External Authentication. I also created a global group "testgroup" and assigned my user "testuser" to the group. In the FileMaker database I created the group account for "testgroup".
When I want to open the database (open remote without filter, then select database) I still get the credential window. However, when I enter testgroup\testuser I can login using the password of my domain user. So authentication works, SSO unfortunately not.
Any idea where to look?