Login to the Portal Server administration console as administrator (amadmin).
Click the Portals tab
Click the portal-ID in the Portals list
Select TopLevel [Global] from the Select DN list
Specify the fully distinguished name (DN) and password for the Anonymous User in the Valid UIDs for Anonymous Desktop list.
Select Add and specify the following:
You must save for the changes to take affect.
The Enterprise Sample adds the siroeauthless user to the list.
Set the Default User DN for anonymous user.
The Default User DN determines which Anonymous Portal the end user is directed to by default. To set the default user DN for siroeauthless anonymous user:
Restart the web container for the changes to take affect.