I just wanted to let you know there is a current issue in 4.8.3 where IDApps logins stops working or takes about 10 minutes to complete.
The reason for this is that if you have disallowed anonomous login in your LDAP config, it also disallows local bind sometimes. Local bind is required to log you in from IDApps.
Not all 4.8.3 are having this issue. I had three environments where two were working fine and one did not work with the exact same config.
A bug is open with MF, but the current workaround is to allow anonomus login on the LDAP interface.