LDAP Group - Channel Assignment Issue

Description:

LDAP Group Channel Map not working.

Steps to reproduce:

1. Set Base DN: OU=Users,OU=Camarena,DC=CAMARENAHEALTH,DC=ORG
2. Set LDAP Group Base DN: OU=Users,OU=Camarena,DC=CAMARENAHEALTH,DC=ORG
3. Group filter: (&(sAMAccountName=#{username})(memberof:1.2.840.113556.1.4.1941:=CN=#{groupName},DC=CAMARENAHEALTH,DC=ORG (objectCategory=person)(objectClass=user))
4. LDAP Group Channel Map: {"IT_Department":"it_test"}

Expected behavior:

End users inside the group IT_Department are automatically assigned to the channel it_test.

Actual behavior:

End user in group IT_Department was not assigned to the channel it_test.

Server Setup Information:

• Version of Rocket.Chat Server: 3.8.0
• Operating System: Ubuntu 20.04.01
• Deployment Method: Manual
• Number of Running Instances: 1
• DB Replicaset Oplog:
• NodeJS Version: 12.18.4
• MongoDB Version: 4.0.21

Client Setup Information

• Desktop App or Browser Version: Both
• Operating System: Windows 10

Additional context

Enterprise customer with about 500 users. Not having a decent LDAP import process for AD is a huge downer. There are other issues concerning LDAP that needs to be addressed. Not sure if I would make a separate issue per.

Start by reproducing the LDAP group channel mapping with the Base DN, group filter, and {"IT_Department":"it_test"} configuration provided. Trace the LDAP group assignment flow and verify that users in IT_Department are assigned to it_test without breaking other LDAP authentication behavior.