KevinTheJedi
Apologies you are correct, did not notice the second page of tables!
In ost_user_account I've got one row with a username entered & the backend set to ldap.client. The account named here is set in the gui to use "Microsoft" authentication and is one of the two accounts I'm using for testing.
The rest are all null for the username but have backend set to ldap.client with the id & user_id fields populated for all of them.
We are currently using LDAP to authenticate but are trying to swap over to oauth.