Hi @elliott, Thank you very much for the explanation. My thought as well was to keep all the user attributes in MongoDB. What I didn’t sure about was, actually, are we using the minimal set of attributes in the LDAP to support Crowd and Atlassian products which are using LDAP. So as @elliott has explained it seems like we do. So we need to keep both. @r0bby, @plypy, @elliott, how can we find out the DB schemas used in both? It will greatly help in finding out the best solution for the project here.