Friends, though Zentyal has its free version, and is not obliged to help anyone, unfortunately commitment to helping others here, is little.
Unfortunately.
However, congratulations on keeping the project and I hope always to be contributing, because I use the ebox to several years.
Referring to my problem.
I've decided.
It turns out that the User MUST "eboxadsync" MUST be in the "users" group. Ie you can not leave it in a separate OU or something, even if he is Administrator.
I just put the User eboxadsyn in place, and everything worked perfectly.
Now this approved Zentyal synchronizes users with AD 2008 R2 (Windows Server 2008 R2 x64)
Thanks to all