Tenant to Tenant Mailbox Migration using BitTitan Migrationwiz | Microsoft 365

Sign up for an account on BitTitan Migrationwiz
Once you have completed your registration and then logged in to the Migrationwiz, click on create a Project - Select Mailbox Project
Once you input the Mailbox Project Name - Select New and fill in the primary email domain information along with the Company Name
Create a Migration Endpoint for both source and destination Endpoint with the information - Endpoint Name, Find My Service Provider and select Microsoft 365, input your domain admin email account and password or create a service account with the Application Impersonation Role assigned to it, then save.
Proceed to either input the source and destination UPN account as a “Quick Add” or “Bulk Add”.
Navigate to Azure Active Directory and create an App Registration, copy out the Application and Directory Tenant IDs - Navigate to Authentication under Manage, scroll down and Authenticate the registered application , then create an API Permission, Add a permission, APIs my organization, search for Office 365 Exchange Online, Delegated permission, Scroll down and check EWS.AccessAsUser.All, then click on Add permission, Grant Admin Consent. This process should also be replicated in the destination tenant.
Navigate to Migrationwiz - Click on the pencil icon on the left and select advance - input the source and tenant application and Tenant IDs which were copied using this format, Source Tenant - ModernAuthClientIdExport & ModernAuthTenantIdExport, Destination Tenant - ModernAuthClientIdImport & ModernAuthTenantIdImport.
Once the above has been added successfully and confirmed, proceed to “Verify Credentials”.
Once verification has been completed successfully, proceed to initiate a pre-stage migration and afterwards, a full migration
Cheers!!

[@jesseschaaf2670]

Where did you pull the Redirect UI from? magically pulled in from a text file.

[@sridhar6156]

Where did you took the redirect URI

[@boedilllard5952]

Thanks - it asks for the client ID and Tenant ID.

[@sashka6698]

This is not a complete guide. Key steps are missing to actually complete the migration.