Whoops - posted before complete.
Download the repare move request and run it
Ignore the rest of what I put above
Then put this in the powershell
$Cred = Get-Credential
This will then ask for your credentials on the old server
New-MoveRequest -Identity 'oldemailaddress' -RemoteLegacy -TargetDatabase NewMailDB -RemoteGlobalCatalog 'OldDomainController' -RemoteCredential $Cred -Target 'maildomain.com'
New-MoveRequest -Identity '
[email protected]' -RemoteLegacy -TargetDatabase Priv1DB -RemoteGlobalCatalog 'acm-ad.acme.lan' -RemoteCredential $Cred -TargetDeliveryDomain 'acme.com'