@MRC-MBU and @Scott_Pierce (from long ago) Hello again.
What version of Rockstor are you experiencing this with?
yum info rockstor
As our AD stuff has been massively updated / improved by @Flox in our Rockstor v4 so that’s definitely the version to use if you are having AD issues. Especially since we can now only releasing updates for the v4 “Built on openSUSE” variant given it’s no longer possible to build on our older, near legacy CentOS base of the v3 variant.
The Rockstor v4 now uses sssd etc so newer technology also. We did for a short while try sssd with v3 but rapidly reverted but it was much earlier days then for the sssd project. There are also a number of fixes for large AD domain as well. I.e. ones that contain many users. Plus a few other fixes.
Hope that helps.