ntozier Hm, I made it blank and it works.
It was a root of my AD (like DC=company,DC=name,DC=city,DC=com) and i had this problem.
BTW, is there a way to specify multiple search bases?
Like
OU=Managers DC=company,DC=name,DC=city,DC=com
OU=IT DC=company,DC=name,DC=city,DC=com
etc.
I want to exclude OUs containing service accounts.