Yes, you can migrate shared mailboxes between two Microsoft 365 tenants using the SysInfo Microsoft 365 Tenant to Tenant Migration Tool. The software supports the migration of primary and shared mailboxes, allowing organizations to transfer emails, attachments, drafts, sent items, deleted items, and other supported mailbox data to the destination tenant while maintaining the folder structure and important metadata. The tool connects to Microsoft 365 tenants using OAuth 2.0 and Modern Authentication, providing a secure way to authenticate the source and destination environments. Administrators can map source and destination accounts, apply date-range filters, remove duplicate emails, and use incremental migration to skip previously migrated items. Before starting, ensure that the destination shared mailbox exists and that the required permissions and licensing are properly configured. Note that Public, Online Archive, and Group Mailboxes are not supported in this mailbox migration workflow.
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