Each administrator need to administer their own site only. Need a way to group people in address book. Want to reject mail coming from unwanted source over internet. Want to prevent certain fields from appearing to anonymous LDAP requests. Want to prevent certain fields from replicating to other sites, but want it visible to people in own site.
Exchange is dirsync server.
Client connections are slow. You have enabled advanced security. As users leave company, you revoke keys. Need to know if you need licenses for POP3 and HTTP clients. Need to know trust levels and where you can apply them.