I have about 10K+ users that I get from a company feed (LDAP). I can authenticate WP via SSO based on someone's username matching on the WP user table. I would like to take the user table I have and combine it with the wp-user table so that I can set permissions, change display name and things like that. Is there a best way to do this?
Also we have about 15 WP installs and will probably have 30 by mid next year. How can I manage these users in one table given that some may have admin rights on one site yet not admin rights on another site?