Quote from trevor james on December 4, 2018, 4:15 AM

Migration of mailboxes Office 365 to Office 365 may create a risky situation. EdbMails provides the simple way to migrate   from one office 365 tenant to   another Office 365. Users can migrate all the mail items like Email, Calendars, Contacts, Tasks, Journals etc.

Pre Requisites:

1. EdbMails Office 365 to Office 365 Migrator tool

2. Impersonated  Source and Destination Office 365 Global admin account

Steps to Perform Office 365 to Office 365 Migration

1.  Install EdbMails Application in you system

2. Select the option “Office 365 Migration”

 

3. Login to Source office 365 Admin account

4. Check the mailbox list in the window, if list is  not found,  load the Mailboxes CSV file and continue.

5. Select the Mailboxes from which you would like to migrate

6.  Click “Migrate to Destination Office 365” button

7. Login to destination Office 365 Admin account

8. Check the mailbox list in the window, if the list is not found load the Mailboxes CSV file and continue.

9. Use automatic mapping or manual mapping method to map source and destination mailboxes

10. Click “Migrate  Office 365 to Office 365 ” button.
 

Also Visit: Office 365 Migrate Mailbox | Upgrade Exchange 2010 to 2016 | Exchange 2010 to 2016 migration | Exchange migration to office 365 | office 365 migration Guide