There is the following note on setting the validity period for password of OS users who use the Systemwalker Operation Manager Task Link function:
The user's password that has been set in the password management book for Task Link must also be updated when the password is due to expire and needs changing.
Refer to "LGMANAGE.EXE Password Management Command" or "lgmanage Password Management Command" in the Systemwalker Operation Manager Reference Guide for the method of changing password management book.