Ldap and non Ldap Users in Rocket


may it possible to register or import (slack) User, while using LDAP Sync?

The core Team uses Univention Corporate Server with some apps. The Accounts are synced with Rocketchat over LDAP.

We want to import some Users from Slack or invite/create a user without LDAP sync (Active Directory) in Rocketchat. At the Moment the LDAP Sync delete all none LDAP Users. In best case we want to use secret url for registration.

can i solve the problem with a group or something?

Best Regards