A calendar session is valid only as long as the Access Manager session is valid. If a user logs out of Access Manager, the calendar session is automatically closed (single sign-off).
SSO applications must be in the same domain.
SSO applications must have access to the Access Manager verification URL (naming service).
Browsers must support cookies.
If you are using the Sun Java System Portal Server gateway, set the following Calendar Server parameters:
service.http.ipsecurity="no"
render.xslonclient.enable="no"