Recently we deployed ZCS in combination with a phpBB3 forum system. phpBB3 uses its LDAP connector to verify logins and create valid sessions. We now like to offer a seamless change for users working within ZCS to switch to the forums in phpBB3. This means that I am looking for a mechanism that allows phpBB3 to check whether a Zimbra session is valid and create a new session inside the phpBB3 system without additional login by the user.
I have looked at pre-auth, but this seems to solve the reverse problem. Does anyone have some hints for me? My idea is to modify the login og phpBB3, so the users go through a single point, thus facilitating the "session handover".