Businesses usually migrate multiple Hotmail accounts to Office 365 by using a dedicated migration solution that can process several mailboxes in a single workflow. Instead of exporting and importing emails manually for each user, administrators connect the Hotmail accounts, select the mailbox data they want to transfer, and migrate everything directly to Microsoft 365. Tools such as SysInfo Hotmail Backup Tool help simplify this process by transferring emails, attachments, contacts, and folders while maintaining the original mailbox structure. This approach saves time and reduces the chances of missing important business communications during migration.