Directory Programming .NET

When I access the FSP from a process running as an account in a different forest it looks like some kind of attribute filtering is happening. The attribute set returned is a small subset of the total number of attributes. I can repro from ADSIEdit as well. The critical thing for my code would be to read the memberOf attribute, but the issue seems generic.

I have tried the delegation of control wizard and opening the ACL but it doesn't seem to have any affet.

Any ideas what might be causing this behavior?

Figured it out. The permissions are more locked down then normal for FSP objects. Giving access to the Foreign Security Principal container through the advanced security tab in ADUC (Read All Properties, Apply to all child objects) seemed to do the trick.