We have a global default password policy configured under iManager. If I increase the minimum password length for our Groups Default Password Policy will all users get told they need to change their password to match the new minimum length, or would it just effect them the next time their password expires, and they need to change it.

The reason I am asking is that :-

I'm hoping to increase the minimum length without it causing any issues or any problems for users, but then once changed I will then expire our users passwords in groups and they i'm hoping would then need to comply with the increased password length.