There are no built-in tools
3rd party solutions:
https://www.priasoft.com/super-exmerge/?from=pf-to-shmbx-popup
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Need to migrate Public folder mailbox from Exchange 2013 to O365 as Shared mailbox. What options available within Microsoft and third party tools? what would be the best options available to achieve public folder mailbox to shared mailbox in O365.
There are no built-in tools
3rd party solutions:
https://www.priasoft.com/super-exmerge/?from=pf-to-shmbx-popup
See the public folder migration explanation below:
https://www.linkedin.com/pulse/public-folder-migration-powershell-z-ahmed-saif-muntaseer/