Users Table empty

[mattgrimley]

Hey @ProServ
That looks familiar. I think i had the same issue.
Fix here if it is:

CMS 3.3.6 upgrade to 4.1.1 - Campaign (etc) sections empty (but the campaigns do exist)

Okay, for any poor soul wandering in to this dark corner of the community forums, the answer is this: In IIS, select your virtual site and click on “Request Filtering”. Next, Choose “Edit Feature Settings” from the list on the very right hand side. Increase the “Maximum Query String (Bytes)” variable from 2048 to 8192. Go make yourself a cup of tea.