A lengthy Exchange Online to Microsoft 365 Public Folder migration is a common challenge, especially for organizations that have accumulated years of shared emails, attachments, calendars, and other business information. The migration may take longer if there are large Public Folders, thousands of items, limited internet bandwidth, or many users accessing the environment during the migration.
One effective way to improve the process is to review the Public Folder structure before migrating. Identify which folders are still actively used and avoid transferring outdated or unnecessary content. Running the migration during non-business hours can also reduce the impact of network activity and improve overall performance.
Many administrators also create a complete backup before starting the migration. SysInfo Office 365 Backup & Restore Software allows you to back up Public Folders, Online Archive mailboxes, and Office 365 mailboxes before migration begins. It also provides options such as selective folder migration, date-range filtering, duplicate removal, and preserving the original folder hierarchy. These features help reduce the amount of data being transferred while keeping important information protected.
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