Tenant-to-Tenant migration in Office 365 involves transferring mailbox data from one Office 365 environment to another, and SysInfo Office 365 Backup Software helps simplify this process. Once the tool is installed, sign in using the credentials of the source tenant. The software will load your mailbox folders in a structured view. You can then select the complete mailbox or choose specific items to migrate. After this, pick “Office 365” as your migration destination and authenticate the second tenant’s account. You can also choose optional settings like skipping previously migrated data, removing duplicates, or filtering by date. When everything is set, click on the Backup or Migrate button, and the tool will transfer your data safely from one tenant to another, maintaining data quality and folder structure.