Some users,groups are not in sync with Crowd?

[artucismet]

Hi,

We are using Crowd Version: 3.1.2 (Build:#891 - 2018-01-19), until one moth ago it working fine. But Crowd lost some users and groups while synchronization  since we add some security patches to  Microsoft AD server. These patches are standard Microsoft patches and they are very important for us so we can not roll back them.

How we can fix this issue,Is there  any solutions, suggestions ?

Thanks a lot