PLANET IM-1000 - Manual (Page 60)

Example 1
IM Management
Internal user must pass the IM authentication, then he/she is allowed
to create MSN connection. (Use the built-in user authentication.)
. Step1 Add authentication user in Authentication Æ User.
Set the authentication user
Step2. Select IM Management Æ Rule Æ Default Rule Æ Accept :
Authentication passed and MSN Message not encrypted. Click OK.
Default IM rule setting