Is there any external authentication set up on these accounts?
I've seen major delays when logging in if logging using a Filemaker Account if other externally authenticated accounts are listed ahead of it in the authentication order. Seems that the system does an exhaustive search for the account in the AD system and then fails into a check inside the file for the FileMaker authenticated account...
In the solution there are some 30 external auth accounts, but they are not addressed.
They are at the bottom of the accounts list - first are the local Filemaker file accounts, which cover the whole plethora of relogins we do.
Timings were done on the attached database, which has no ext auth.
Besides, we are talking about the same database set, what changes is the FMP version.