XSP and Client Notes configuration getting error message

Hello

I’m using a server installed with the XSP option and I get the classical error message (“You are not allowed to make this operation”) when I want to configure a Notes Client with a user ID member of a HostedOrganization.

I can go with the configuration until I get the two cross certificate windows and then I’m getting the error message.

I can’t reach the “Instant messaging” configuration window.

If I put the user in LocalDomainAdmins then I don’t get any problems…

Does anybody could help me to find what’s happening?