"TMOS Management Guide for BIG-IP Systems" says: "Excluding the admin account, the entire set of standard user accounts that you create for BIG-IP system administrators must reside either locally on the BIG-IP system, or remotely on another type of authentication server."
But I noticed today (some weeks after implementation), that login with this local user is not possible anymore. I found out, that the changes to your mentioned files were gone. Are these settings maybe not reboot-safe or gets lost during a software update?
Can you please share some details here and is it possible to have these settings persistent?
Tried to modify the database parameter, and succeeded, but stil not able to create a local user. When I tried to create a user via cli, and then change the password, I still get the answer "Please change the password at the remote authentication server". Also in the GUI there is no extra trace of a field that suggest a local user fallback. Maybe it is easier to plan a migration to version 13.