Migrating tenant to tenant in Office 365 manually is a complex process that involves multiple steps. First, you need to prepare both the source and destination tenants by verifying domains, setting up users, and configuring permissions. Then, you must export mailboxes using PowerShell scripts and move OneDrive data, SharePoint sites, and Teams information manually. This process is time-consuming, requires technical expertise, and can lead to data loss, prolonged downtime, or misconfigurations. Additionally, migrating permissions and ensuring coexistence during the transition can be challenging. 

To simplify this, you can use the MCD Office 365 Migration Tool, which automates the entire migration process. This tool ensures a seamless transfer of emails, contacts, calendars, OneDrive files, and SharePoint data while maintaining folder structures and permissions. It minimizes downtime, reduces manual effort, and eliminates the risk of data loss. With features like batch migration, delta sync, and real-time tracking, it ensures a smooth transition between tenants without interrupting business operations. Whether you're consolidating multiple tenants or moving to a new organization, using an automated solution like this makes the process faster, more reliable, and hassle-free compared to the manual method.