APM - password expiry warning

Hi.

Would this article be helpful?

K15497: Configuring a secure password policy for the BIG-IP system (11.x - 14.x)

https://support.f5.com/csp/article/K15497

Expiration Warning

Specifies the number of days prior to password expiration that the system sends a warning message to a users. 

The default value is 7, and the system allows the range of values from 1 to 255