Is it possiable to limit the number of mailboxes assigned to database ? thank you

Yes. Stop creating mailboxes on the database! Exchange 2010 will assign mailboxes automatically more or less randomly to databases, and you can control whether each database participates in that, so you have somewhat more control. It won't stop an administrator choosing that database, though.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

sorry, to nicely put it, no. just create a script that monitors the number of mailboxes on the database. let me know if you need help w/ that script.Z-Hire -- Automate IT Account creation process ( AD / Exchange / Lync ) Z-Term -- Automate IT account termination process ( AD / Exchange )

thank you, I found a scipt that will monitor my usage