Email migration is one of the most critical aspects of an Office 365
tenant to tenant migration. Migrating emails without downtime is important for maintaining business continuity. The typical challenge is ensuring that the user’s inboxes, calendars, contacts, and folders transfer smoothly while minimizing service interruptions. One way to reduce email downtime is by using third party solutions.
It is also helpful to educate end-users on changes to their mailbox configurations, such as potential changes to Outlook profiles and connection settings. Manual migration process is very tricky and requires additional cross-tenant user data migration license.