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Best practices for public folder preparation before migrations

The_Exchange_Team's avatar
The_Exchange_Team
Icon for Microsoft rankMicrosoft
Nov 19, 2020
We wanted to share some best practices to prepare the on-premises public folders for migration to Exchange Online. The document will walk you through the overview of process to migrate public folders...
Updated Jan 27, 2021
Version 3.0
Exchange 2010
Exchange 2013
exchange online
Migration
momurray's avatar
momurray
Brass Contributor
Nov 21, 2020

Thanks for that great article!

 

"Do not place any content in the primary hierarchy mailbox"

 

This best practice is very hard/impossible achieve :

  • Migration scripts provided by Microsoft always maps the root hierarchy ("\") in the first PF mailbox. As a result, all PF not explicitly mapped to a specific mailbox gets migrated into mailbox 1. Also, \NON_IPM_SUBTREE always gets migrated to PF mailbox 1.
  • After the migration, Exchange Online does not allow moving PF between mailboxes (New-PublicFolderMoveRequest)
  • Hopefully, migration scripts configures the IsServingHierarchy flag to false on the primary hierarchy mailbox but I don't see how we can avoid migrating data into this mailbox using Microsoft provided scripts

Am I missing something?

 

Thanks!