One small thing that was in the 1.7 release was a user decay feature where Clearspace will go out on a nightly basis and find any users who haven't logged into the system in a year and would then disable them. There was a glitch with the 1.7 release process where the wrong 1.7 build was posted which had a bug related to this. Can you try downloading / redeploying 1.7 again?
Got it. I'll check tomorrow to see if it worked. Thanks.
That fixed the problem.