Exchange 2007 - Interforest Mailbox Move

(don't be hasty with this process...Exchange 2007 Server is set to Africa-time)

Mailbox Migration from Exchange 2007 to another Exchange Server 2007 in a new domain.

$SourceCredentials = Get-Credential
domain\user

$TargetCredential = Get-Credential
domain\user

Move-Mailbox -TargetDatabase "mail1\First Storage Group\Users" -Identity username -GlobalCatalog server.domain.co.uk -SourceForestGlobalCatalog server.domain -NTAccountOU "OU=User Accounts,DC=domain,DC=company,DC=co,DC=uk" -SourceForestCredential $SourceCredential -TargetForestCredential $TargetCredential

CONFIRM
Are you sure you want to perform this action?
Moving Mailbox username to database mail1\First Storage Group\Users. The operation can take a long time and the mailbox will be inaccessible until the move is completed.

[Y] Yes [A] Yes to All [N] No [S] Suspend ?

"Opening source mailbox....."

AT the end the status message (right at the bottom of the confirmation) should say This mailbox has been moved to the target database.

Errors that I've encountered so far:

Failed to set basic mailbox information.

Mailbox was created as a "linked-mailbox" what is a linked-mailbox?
A linked mailbox is a mailbox in a seperate trusted forest.

How to convert a linked-mailbox to a regular mailbox?

Set-Mailbox UserXX -Type Room

You can use the following values for the Type parameter:

• Regular
  
• Room
  
• Equipment
  
• Shared

Mailbox Migration changes the Alias & Primary SMTP Address?

Give the server time to process the new mailbox (especially) in my case where the new Exchange server have not been in use for a few months...just sitting there.

You can view the Eventviewer to doublecheck