Cisco Unity Installation Manual page 179

Security
Like the Unity Administrator, the Status Monitor relies on the
Windows NT/2000 challenge and response to authenticate the
user name and password in the background. You may or may
not be asked for a name and password when accessing the Sta-
tus Monitor, depending on which account you used to log on to
Windows NT/2000 and which domain you are logging on from.
When the Status Monitor has been inactive for 15 minutes, you
must exit and restart Internet Explorer to reaccess the Status
Monitor.
Once a user has been authenticated, Unity checks that the
user's class of service allows access to the Status Monitor.
(This is set on the Subscribers > Class of Service > System
Access page.)
NOTE: To prevent unauthorized users from making changes,
when you are not working at the Unity server, lock or log off of
Windows NT/2000.
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APPPENDIX C: Using the Unity Administrator and Status Monitor