Nov 14 2016

Error: MigrationRecipientNotFoundException: A recipient was not found for “mailboxName”

If you received the error “Error: MigrationRecipientNotFoundException: A recipient was not found for “mailboxName”” when migrating a mailbox to Exchange Online (Office 365) then check for the below AD attributes.

The error from the Exchange Admin Portal on Office 365:

0365migrationrecipientnotfound

Open the on premises Exchange Management Console and search for the user. You should see the mailbox shows it’s a Linked Mailbox instead of a Remote Mailbox as expected:

linkedmailbox

To rectify this, open AD Attribute Editor and browse to the msExchRecipientTypeDetails attribute. You should see the below:

msexchrecipienttypeforlinkedmailboxes

Change the Value of 2 to 1 for msExchRecipientTypeDetails as you need the mailbox to show as a user mailbox on premises before trying to migrate it to Exchange Online.

1

Wait for replication, remove the move request in Exchange Online via Shell and then migrate the mailbox to Exchange Online