Disable Strong Password Enforcement And Password Aging

                                          By default Microsoft Windows Server 2012 enforces users in the Administrators group to use strong passwords. Home users often just want to create their own passwords or leave them blank.

      1. Open Start ---> Administrative Tools ---> Local Security Policy ---> Account Policies

                   ---> Password Policy.

       2. In the right pane of Password Policy double click Password must meet complexity requirements   
            and set it to Disabled.

For enabling the Password never expire :-

          Open the Maximum password age policy and set set the value to 0. Click OK to apply the change.