What is Shared Mailbox?
A Shared mailbox in Office 365 allows multiple users to access, send, and manage emails from a common email address. It enables teams to collaborate on customer inquiries, project updates, or general business communications without assigning individual mailboxes. Unlike user mailboxes, shared mailboxes do not require a license (except for storage exceeding 50GB).
Why Migrate Shared Mailboxes Between Office 365 Tenants?
Organizations may need to migrate shared mailboxes between Microsoft 365 tenants due to:
- Mergers & Acquisitions
- Divestitures & Splits
- Rebranding & Restructuring
- Compliance & Data Residency Requirements
Shared Mailbox to Shared Mailbox Migration with Apps4.Pro
Shared mailbox migration is a complex process that involves transferring shared mailboxes from one Microsoft 365 tenant to another. Apps4.Pro Tool supports the shared mailbox migration from one Office 365 tenant to another without data loss.
Apps4.Pro offers migration of shared mailbox data within a custom timeframe, such as 1 or 3 months, or a user-defined period.
The following items are supported :
- Emails
- Calendar events
- Contact
- Permission
- Rules
Bulk Migration
When you need to migrate multiple mailboxes, simply create a CSV file with an accurate list of source and destination shared mailboxes.
Apps4.Pro takes care of moving them from one tenant to another and tracking the migration process in real time which is crucial in identifying potential issues early and ensuring a smooth transition.
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Step-by-Step Shared Mailbox Migration
Step 1: Download and install the migration tool.
Step 2: Configure the source and target connections for migration.
Source Configuration:

Target Configuration:

Step 3: Map the shared mailbox and users using the email address.


Step 4: Select the shared mailbox you want to migrate and click “Migrate”

Incremental migration:
Supports incremental migration by skipping previously migrated data and transferring only new items to the destination after the initial migration.

Ensure the Successful Migration
Detailed Post-Migration Report: Apps4.Pro provides detailed post-migration reports, including details like mail count, event count, contact count, errors, and warnings. Track the migration status of shared mailboxes, review any errors or warnings, and access information to efficiently resolve issues.
