Account: Failed to sync ADS account information - All my accounts are GONE!

RN516 v6.10.1. Its been working prefectly fine for the last couple of weeks since the re-install, no issues. Today at 2:27 AM I get and email alert saying "Account: Failed to sync ADS account information". All of a sudden, alll of my users accounts are GONE! what the hell is this? I tried to re sync and the ReadyNAS sees the domain, green light, but cannot sync accounts.

I re-installed this unit after a complete crash a few weeks ago, restoring from backups. Its been fine until today. This is disastrous, I cannot begin to explain to you what kind of a mess Im in now since no one can access the NAS. Again. Im this close to throw this piece of garbage to the curb.

The dc is Windows Server 2008 R2. There are no issues whatsoever with it. I can load and browse AD withtout any problems.

Tell me how to fix this.