Are there any supported ways to do cross-forest migration where the source forest is Exchange 2013 and the destination forest is Exchange 2010?

• Edited by Jukka Kettunen 22 hours 52 minutes ago

You we can move mailboxes from Exchange Server 2013 to Exchange server 2010. You can use the Prepare-MoveRequest.ps1 script in the EMS to prepare mailboxes for cross forest moves. For more information please check this - Prepare mailboxes for cross-forest moves using the Prepare-MoveRequest.ps1 script in the Shell: https://technet.microsoft.com/en-us/library/ee861103%28v=exchg.150%29.aspx

Alternatively, you may try this automated solution i.e. http://www.lepide.com/exchangemigrator/cross-forest-migration.html which allows to migrate between exchange servers with real-time coexistence.

Prepare-MoveRequest.ps1 script would work even that the destination is 2010?