User permissions per Dashboard

Hi Team, trying to add existing users to organisations. But after re-login all the new users added to corresponding organisations were getting wiped off. Tried with name/id/e-mail of ldap. It’s adding but clearing right after re-login.
Tried with UI, API & DB as well. Is there something we need to look at LDAP ?
By default users are mapped to Org-1. We want to map users to particular org’s instead of all.

If you use ldap you have to specify what orgs users should get access to in ldap toml config file.