Recently I setup one new ACS5.1(upgrade from 5.0) for device admin with ACS internal user id stores. Also enable "Disable user account after 90 days if password was not changed." in user authentication settings. But I met a problem that when user got the initial ID and password and login device to change password, he can change and login successfully, but later(may be 30 mins or one hours later), user account became disable and showed password expired.
Is there any setting I missed or need to check? Thanks in advance.