OK, heres a good one for the EXPERT EXPERTS....
Here in the NHS there is NO root forest, .nhs.uk does not exist in the AD sense. Each "NHS Trust" creates a new domain that is the forest root.
So when Trust1 set up AD for the first time they set up a forest of trust1.nhs.uk. When Trust2 set up they set up a new forest of trust2.nhs.uk. All with NOBODY in either trust knowing anything about the other and there is no need for any communication between the 2.
Now I am asked to visit trust1 and try and do a cross forrest migration and move users and mailboxes from trust1 to trust2. When I try, after creating the users manually in trust2 along with coppies of all the correct attributes, msExch..... cn, etc... It fails with an error of
Missing switch/Parameter: RemoteOrganizationName
Or words to that effect, im OOF now but will correct if its slightly different later. That parameter is listed as being a microsoft internal use switch.
Any idea how to proceed? Is the fact that both domains/forest end in .nhs.uk going to be a BIG problem?