I have hundreds of departments in my department list. Departments, that do not exist in my company. Whenever I import requesters from my Active Directory, lots of departments are duplicated. Departments, that do not exist in my Active Directory at all.
It seems, these are departments, that come within the first installation of SDP
See attached Screenshot for details. It is really hard work to delete over a hundred "accountant" departments just to find some of them again after the next import from the AD.