Forum Discussion

Copper Contributor

Apr 23, 2019

Solved

Migrate OME mailbox between tenants

Hi, I need to migrate a couple of mailboxes between two Office 365 tenants. The source tenant uses OME (Office 365 Message Encryption) which complicates things. I need to remove the encyption bef...

exchange

office 365

TonyRedmond
Apr 23, 2019
VasilMichev A topic covered in https://www.petri.com/exiting-office-365-encrypted-messages-documents

VasilMichev

MVP

Apr 23, 2019

I'm not aware of any products that decrypt messages as part of the migration process, but it's certainly doable via the API or PowerShell. I know TonyRedmond will love this thread :)

TonyRedmond

MVP

Apr 23, 2019

VasilMichev A topic covered in https://www.petri.com/exiting-office-365-encrypted-messages-documents

nalle_jacobsson
Copper Contributor
Apr 24, 2019
TonyRedmond Thank you!

The solution is to export to .pst and use Powershell to decrypt (via Unprotect-RMSFile)
- Colm Counihan
  Iron Contributor
  Jul 17, 2019
  nalle_jacobsson
  Are there any options for migrating from one tenant to another while keeping the encryption intact?
  
  Is there an option for removing the encryption from all email in specific inboxes prior to a migration without saving them to PSTs?
  - TonyRedmond
    MVP
    Jul 17, 2019
    Colm Counihan as tenants have different encryption keys, you can't move content from one tenant to another and keep encryption.
    
    As to removing encryption from messages, the issue is scale and speed. The easiest and quickest way I can think of is to run content searches to find and export messages from user mailboxes to PSTs. Sorry.