Change password at next logon

[ddisco22]

When having users log on to domain I am forcing a user to

change password at next logon and they are getting access denied! It's wierd because it is not happening to everyone just some. I have verified that the "password never expires"and /or "user can't change password" is NOT checked. Can anyone assist with this please??

[AWS]

If it is happening to some user and not others it could be they are trying to use the same password.