Public folder batch migration

TA.Saurabh.Singh 41 Reputation points

There is a 25gb limit on the MS method to perform public folder migration to office 365.

400 gb is total size of public folder source Exchange - on premise.

Is this possible to split of folders into smaller folders at source to less than 20 GB and then migrate?

It(split) can be reverted?

is there hcw- hybrid connectivity necessary to perform public folder migration exchange to O365.

Microsoft Exchange Online
Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
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  1. Sedat SALMAN 5,325 Reputation points

    Microsoft does have a method for batch migration of public folders to Exchange Online that can handle larger sizes by breaking up the migration into batches.

    You can split your public folders into smaller folders at the source, each less than 20 GB, and then migrate. This process involves creating multiple public folder mailboxes at the source and moving the content to these mailboxes before migration. Be aware that moving public folder content around can be a complex and time-consuming process, and you should plan and execute this carefully to avoid data loss.

    The Hybrid Connectivity Wizard is typically used to set up a hybrid deployment between an on-premises Exchange organization and Exchange Online. For migrating public folders, it's not necessary if you are using a cutover migration strategy. However, if you want to use a staged migration where some mailboxes remain on-premises while others are in the cloud, or if you want to use the HCW's features for managing the migration, then you would need to set up a hybrid deployment.

    After migration, it should be possible to reorganize the public folders in Office 365 to your desired state. Again, you would need to plan and execute this carefully to avoid data loss.

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  2. Shaofan Lv-MSFT 460 Reputation points Microsoft Vendor

    Hi @TA.Saurabh.Singh ,

    Agree with Sadet, you could refer to the MS DOC. Use batch migration to migrate Exchange Server public folders to Exchange Online

    It is mentioned in the document: Before you begin the public folder migration, if any single public folder in your organization is larger than 25 GB, we recommend that you delete content from that folder to make it smaller or divide the public folder's content into multiple.

    Best regards

    Shaofan Lv

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