Cross Domain Administration Process "not unique"?

Hello

I have two Domino Domains which are cross certified and cross domain administration requests were working a while ago.

I don’t know if something’s changed in the mail routing settings.

On Domain1 it sais “Recipient user name Administration Requests (Administration Requests@Domain2) not unique. Several matches found in Domino Directory.” and on Domain2 the opposite.

I already tried to find something using the “ctrl-shift” $Users-view but I can’t find any duplicate of “Administration Requests”.

Could a Condenced Directory Application cause this error?

Any Ideas.

Thanks a lot

Ben