Can I migrate Public Folders to Shared Mailboxes?
The following Destinations are supported for Public Folder migration projects:
- Public Folders
- Shared Mailboxes
- If migrating to Public Folders, then the steps in the relevant Public Folder migration guide should be followed. As an example, here is the migration guide for migrating from On-Premises Exchange to Office 365 KB004927.
- If migrating to Shared Mailboxes, then the steps in the relevant Public Folder migration guide should still be followed. However, the "Prepare Destination Environment" steps will be different. The Shared Mailbox will need to be created on the Destination, prior to migration. The steps to create these are defined in the following TechNet article here.
Additionally, when migrating to Shared Mailboxes, the MigrationWiz project Advanced Option for Destination Settings needs to be changed to Shared Mailbox, from the default setting of Public Folder, as shown in the screen shot below:
- Shared Mailboxes on Office 365 have a mailbox size limit of 50GB. Therefore, if the Source Public Folders are larger than 50GB, then a prerequisite to migration will be to split up the Source Public Folder structure into smaller Public Folders, create the necessary number of Shared Mailboxes on the Destination, and then add the Public Folders into the MigrationWiz project.
- When adding the Public Folders to your project, both the Source root folder and the Destination email address of the Shared Mailbox will need to be set.