To migrate emails from one Microsoft 365 tenant to another, you can use the SysInfo Microsoft 365 Tenant to Tenant Migration Tool for a secure and simplified transfer. First, connect the source and destination tenants using OAuth 2.0 authentication and provide the required Global Admin access. Next, select the mailboxes you want to migrate and map each source mailbox to its corresponding destination account. You can apply filters such as date range, folders, and attachments to migrate only the required data. The tool also supports incremental migration, allowing previously migrated items to be skipped, while its duplicate-removal feature helps maintain clean mailboxes. Once the configuration is complete, start the migration and monitor its progress through the live migration dashboard. The software can preserve mailbox folders, emails, attachments, contacts, and calendars while transferring data securely through TLS-encrypted HTTPS. It also supports exporting Microsoft 365 mailboxes to PST when required.