I am operating an Exchange 2013 CU7 in a co-exit environment with an Exchange 2010 server. when I try to setup a mailbox migration through the EAC I receive and Error "Multiple potential Migration mailboxes were found for this organization. Please specify a particular Partition mailbox to use." and I can go any further or finish performing the migration.

any thoughts would be appreciated.

Hi ,

Thank you for your question.

Could you tell me more detailed steps which you migrate mailbox from Exchange 2010 to Exchange 2013?

If we just migrate a specific mailbox to Exchange 2013, we could refer to the following steps in EAC:

1. Choose mailbox which we want to migrate to Exchange 2013;
2. In Details pane, choose To another database;
3. Type New migrate batch name and choose Target database which belongs to Exchange 2013;
4. Click Next and New to migrate mailbox from Exchange 2010 to Exchange 2013.

You could  tell us which step you have got error and post error snapshot to ibsexc@microsoft.com for our troubleshooting.

We could check if there are any relevant event id in Event Viewer.

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim

Jim thank you for inquiring. the error message appears as soon as the Migration tab is selected.

"Multiple potential Migration mailboxes were found for this organization. Please specify a particular Partition mailbox to use."

if you click on the OK button of the error message, you can proceed forward with selecting an account to migrate as you mentioned in step 1 2 3 and 4.

1. Choose mailbox which we want to migrate to Exchange 2013

2. In Details pane, choose To another database

3. Type New migrate batch name and choose Target database which belongs to Exchange 2013

4. Click Next and New to migrate mailbox from Exchange 2010 to Exchange 2013.

but once you click New the error message reappears and you cannot proceed further with the migration. if you click OK it just takes you back to step 4.

Hi! If you hace errors with the mailbox i recomend first remove all the data of the migration

Remove-MoveRequest 

Identity: yourmailbox@domian.com

Select: [A]

Then Try to migrate your mailbox with this command

'mail@domain.com' | New-MoveRequest -TargetDatabase "Database" -BadItemLimit 200 (if you hace corrupted mails)

I hope this can resolve your problem.

Hi! If you hace errors with the mailbox i recomend first remove all the data of the migration

Remove-MoveRequest 

Identity: yourmailbox@domian.com

Select: [A]

Then Try to migrate your mailbox with this command

'mail@domain.com' | New-MoveRequest -TargetDatabase "Database" -BadItemLimit 200 (if you hace corrupted mails)

I hope this can resolve your problem.

• Marked as answer by Simon_WuMicrosoft contingent staff, Moderator 22 hours 33 minutes ago

Hi! If you hace errors with the mailbox i recomend first remove all the data of the migration

Remove-MoveRequest 

Identity: yourmailbox@domian.com

Select: [A]

Then Try to migrate your mailbox with this command

'mail@domain.com' | New-MoveRequest -TargetDatabase "Database" -BadItemLimit 200 (if you hace corrupted mails)

I hope this can resolve your problem.

• Marked as answer by Simon_WuMicrosoft contingent staff, Moderator Sunday, March 08, 2015 8:46 AM

Hi! If you hace errors with the mailbox i recomend first remove all the data of the migration

Remove-MoveRequest 

Identity: yourmailbox@domian.com

Select: [A]

Then Try to migrate your mailbox with this command

'mail@domain.com' | New-MoveRequest -TargetDatabase "Database" -BadItemLimit 200 (if you hace corrupted mails)

I hope this can resolve your problem.

• Marked as answer by Simon_WuMicrosoft contingent staff, Moderator Sunday, March 08, 2015 8:46 AM

this is an image of the error that appears as soon as the Migration tab is selected.

even if you select OK and proceed with the Mailbox Migration wizard it will error with this message as you try to complete the migration.

• Edited by Don343 14 hours 16 minutes ago

this is an image of the error that appears as soon as the Migration tab is selected.

even if you select OK and proceed with the Mailbox Migration wizard it will error with this message as you try to complete the migration.

• Edited by Don343 Tuesday, March 10, 2015 5:08 PM

I contacted Microsoft to work through this error message and we were able to get it resolved.

hear is the solution for this error message.

within "Active Directory Users and Computer" in the Users OU, find and delete the following accounts. (don't worry we will recreate them in a few moments.)

DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}

FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042

Migration.8f3e7716-2011-43e4-96b1-aba62d229136

SystemMailbox{1f05a927-0acd-45d5-9bc1-1a123e6fc52e}

SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}

SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}

Once they are removed, go to your Exchange 2013 server and run the following command from an elevated command prompt

(locate the Exchange Setup File from you CD or download location and run)

Setup.exe /Preparead /IAcceptExchangeServerLicenseTerms (this recreates all the account we just deleted.)

we are almost done. next we have to enable the accounts. This time from 2013 "Exchange Management Shell" run the following commands one at a time.

Enable-Mailbox Arbitration DiscoverySearchMailbox {D919BA05-46A6-415f-80AD-7E09334BB852}

Enable-Mailbox Arbitration FederatedEmail.4c1f4d8b-8179-4148-93bf-00a95fa1e042

Enable-Mailbox Arbitration Migration.8f3e7716-2011-43e4-96b1-aba62d229136

Enable-Mailbox Arbitration SystemMailbox{1f05a927-0acd-45d5-9bc1-1a123e6fc52e}

Enable-Mailbox Arbitration SystemMailbox{bb558c35-97f1-4cb9-8ff7-d53741dc928c}

Enable-Mailbox Arbitration SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}

Set-Mailbox "Migration.8f3e7716-2011-43e4-96b1-aba62d229136" -Arbitration Management:$true

once you have completed this you will be able to close the Exchange Admin Centre, then log back in and go to Migration tab without any errors.