Error when trying to migrate users to another dbs exchange 2103

Issue with migration of users emails via the exchange 2013 EAC
I keep getting the following error each time I try a migration:
A valid Migration mailbox could not be found for this organization.

Here is what I did to try to resolve the issue but even after doing this, I am still getting the same error.
 Remove the mailbox: Go to CN=Users and delete all the system mailboxs

2. Once removed, you have to run the Setup.exe /PrepareAD /IAcceptExchangeServerLicenseTerms

3. The user accounts are now created again, and the next step is to Mail-Enable them:

Get-User | Where {$_.Name –like "SystemMailbox*"} | Enable-Mailbox -Arbitration
Get-User | Where {$_.Name –like "FederatedEmail*"} | Enable-Mailbox –Arbitration
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After enabling system mailboxes you will need to run the below command:

Set-Mailbox "ArbitrationMailboxID" -Arbitration –Management:$true

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vmichAuthor Commented:
When I try running that, I get the error message that the arbitrationmailbox cannot not be found on our second domain controller..
did u try to get the identity of your aribtration mailboxes?
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vmichAuthor Commented:
Get-Mailbox -Arbitration | fl name, alias
Yes I ran this and it shows 3 system and 1 federated mailbox
AmitIT ArchitectCommented:
Check my article:

Make sure you run: Set-AdServerSettings -ViewEntireForest $True
vmichAuthor Commented:
Ok I ran the command that Amit mentioned but when I run Set-Mailbox "ArbitrationMailboxID" -Arbitration –Management:$true
It is still complaining that it does not exist on our second DC
vmichAuthor Commented:
Ran the command
Set-Mailbox "Migration.8f3e7716-2011-43e4-96b1-aba62d229136" -Arbitration –Management:$true
and now all is good for the migration.
Glad to know that all is working now :-)
vmichAuthor Commented:
Set-Mailbox "Migration.8f3e7716-2011-43e4-96b1-aba62d229136" -Arbitration –Management:$true
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