I recently come across a question on EE about updating GAL entries (i.e. AD user attributes) via csv.
I wasn’t sure, so did a quick google.
There is a script (http://www.wisesoft.co.uk/scripts/vbscript_update_user_attributes_from_csv.aspx) that allows this. The instructions on the linked page are detailed enough, so take this as a reminder to me (and anyone who comes across this) of where to find it and how to do it 
