Unable to update password

[Guest]

I made some changes to the default group policy for passwords.
Like password complextity., length and etc.

I went into AD users and computers and started unckecking the
box in account which says password never expires and all of sudden
after changing about 3 or 4 users and starting from 5th user I satred
getting an error the moment I unchecked password never expires
and tried to check user must change password on next logon

error:

The followung AD error occured: Unable to update password. The value
provided for the new password doesn't meet the length, complexity of history
requirement of the domain.

Please advice ASAP. SOS !
I am logged in as administrator.

 

[Guest]

Seems like your users passwords are all not matching with your complexity
policy already... it just took time for the GPO to spread out to all the DCs
and check the pwds on the accounts.

 

[Steven L Umbach]

I have seen that before if the user account you do that to has a blank
password and the password is older than specified in your current password
policy. You could try to "reset" the password to a password that complies
with your policy. --- Steve