You can enter a longer password, but only the first eight (8) characters are checked.     So change the password to something completely different and it wil work as expected.    It's very common for customers to leverage an AD domain instead of using local accounts.   Regards, 
Group of PS6000E/XV and one PS6100X running firmware 6.0.7 I changed the grpadmin password in the web interface. Now I can log into grpadmin using either the new or old password. How do I force the old password not to work anymore? thanks Mike
changed password, old password still works