I found that when I was trying to "Un-set" a user property, I could not do it by passing a null string, None, or anything else I tried.
I was using Tim Golden's active_directory module and found his work-around here:
http://mail.python.org/pipermail/python-win32/2011-February/011199.html line In case the link goes away, here is the line you need:
PutEx 1st parameter is:
Const ADS_PROPERTY_CLEAR = 1 Const ADS_PROPERTY_UPDATE = 2 Const ADS_PROPERTY_APPEND = 3 Const ADS_PROPERTY_DELETE = 4
Since clear works for my case, I did not test other cases for delete or append. Good luck!
import active_directory as ad me = ad.find_user () me.PutEx (1, "telephoneNumber", "IRRELEVANT")
The key being the string can't be null, so set it to what-ever you want!