Hello guys
I have Enterprise Portal installed in Windows server 2016.
In System Configuration - UME configuration - LDAP Server - Name server we have set an alias DCsCEP for the name server option.
We have 3 domain controllers replicating in our enterprise.
In DNS server we have that alias DCsCEP with the ip addresses of that 3 domain controllers

When we have to restart one of the domain controllersn for someone reason, windows updates, fails, etc, the SSO in java systems stops working, only manual user and passwords works, after domain controllers restart we have to restart our SAP sytem to recover the SSO functionality.
Why is this happening?
Regards
Marco