Office 365 Archive Mailbox to Shared Mailbox Migration
Office 365 archive mailbox to shared mailbox migration moves supported content from a Microsoft 365 Online Archive (In-Place Archive) into a prepared destination shared mailbox. This is a content-migration workflow; it does not convert the archive mailbox object into a shared mailbox or automatically recreate archive, retention, hold, or eDiscovery configuration. Organisations can use this scenario when historical mailbox content needs to remain centrally accessible to an authorised team, including after an employee leaves or when a department needs shared access. The destination shared mailbox should be created and prepared in the target Microsoft 365 tenant before mapping.
To perform this scenario, organisations can use EdbMails Office 365 migration software. EdbMails connects to source Archive Mailboxes (In-Place Archive), connects to target Primary/Shared Mailboxes with OAuth 2.0-based modern authentication, and lets administrators review automatic mapping or select destinations manually. Its incremental migration workflow can process supported new or changed items on repeat runs according to stored migration information. EdbMails also supports concurrent migration for multiple mailbox tasks; actual duration depends on archive size, item count, selected scope, network conditions, Microsoft service behavior and available resources. Automatic mailbox mapping can reduce manual mapping work, while the destination shared mailbox must already exist and administrators should verify the mapping before migration. EdbMails provides free 24/7 technical support throughout the migration process.
Top reasons for Office 365 Archive mailbox to Shared mailbox migration
- Improved accessibility and collaboration
Archive mailboxes are designed for individual users and are typically accessible only to the mailbox owner. Migration to the shared mailbox helps the multiple team members access the same archive emails which results in smooth collaboration and communication of team members. EdbMails streamlines the entire process by automated migration features.
- Streamlined data management
Managing email data across multiple individual accounts can become increasingly complex as organisations grow. By migrating your archives into shared mailbox, you have a consolidation of data, making it easy for all the members of the team to access essential mails. Efficient EdbMails' mapping and migration assures safe transfer of data.
- Cost-effective solution
Microsoft licensing and capacity depend on the source archive and destination configuration. A shared mailbox can generally operate without a separate license assigned directly to it within Microsoft's unlicensed shared-mailbox storage allowance, while larger capacity, archive, hold, and other licensed features can require additional licensing. Users who access the shared mailbox also need appropriate Exchange Online licensing.
- Simplified compliance and retention
Moving supported archive content to a shared mailbox can centralise access to historical email. Destination retention policies, retention labels, holds, eDiscovery settings, archive configuration and other Microsoft 365 compliance controls are separate and should be reviewed or configured for the destination according to organisational requirements and licensing.
- Enhanced continuity after employee departures
When employees leave an organisation, their archived emails may still contain important business information that needs to remain accessible. Transferring the old emails into a shared mailbox allows other staff members access, enabling continued work or a requirement of compliance.
- Improved accessibility and collaboration
Office 365 Archive mailbox to Shared mailbox migration Planning
- Ensure that you create and enable the In-Place Archiving in Office 365 before you migrate.
- Determine whether you want to migrate the Archive mailboxes to Office 365 Shared mailbox.
- If you want to migrate the Archive mailbox directly to Office 365 Shared mailbox, enable the auto-expanding archiving feature on Office 365.
- Archive mailbox capacity depends on the Microsoft 365 or Exchange Online license and configuration. Qualifying plans or add-ons can support auto-expanding archiving up to Microsoft's documented maximum; do not treat auto-expanding archiving as unlimited storage.
- Verify if your Exchange online mailbox license allows the archiving feature.
- See the list of auto-expanding archiving restrictions and consider the following points for all users.
- If you would like to learn more about archiving, see how the auto-expanding archiving works.
- Verify the current Microsoft licensing requirements for archive capacity and auto-expanding archiving before planning the migration.
- Perform a test migration to the target before you start the actual one.
Pre migration activities for Office 365 Archive mailbox to Shared mailbox migration
- For Auto Registration, use the Global Administrator access required by the documented EdbMails connection workflow. For Manual Registration, follow the documented account and permission requirements for that method.
- Prepare your target Office 365 tenant. See tenant roadmap for Microsoft 365.
- Create Shared mailboxes on the target Office 365 tenant and set the required permissions
- Assign the Organization Management role group in Exchange online to the admin user on both the source and the target.
- Set the impersonation rights for the admin account in Office 365 to migrate mailboxes on behalf of other users in your organization.
- Verify that the source and target accounts have the permissions required by the selected EdbMails connection and registration method.
Steps to migrate Office 365 Archive mailbox to Shared mailbox
Step 1: Download and install EdbMails Office 365 migration software
- Download and install the EdbMails application on your computer running on Windows OS.
- Start the application and enter the required details and click the 'Login' button or click the 'Start Your Free Trial' button to continue.
- Select the 'Office 365 Migration' product from the products list.
- Choose the 'Office 365 to Office 365 Migration' option.
- You can keep the default job name or click the 'New Job' button to change it.
- Click the 'Next' button.
Step 2: Connect to the source Office 365 server
- Click 'Add New Connection' to create a new connection to the source Office 365, or select an existing one from the list and click 'Connect to Existing' to proceed.
- Choose 'Connect to Archive Mailboxes (In-Place Archive)' and click 'Next'.
- Select your preferred authentication method and click 'Next' to continue
Connect to Office 365 server using secure modern authentication
- Authenticate on Microsoft sign-in page
- Select a method to load the mailboxes, or use a CSV file to load and migrate them.
- Click 'Add New Connection' to create a new connection to the source Office 365, or select an existing one from the list and click 'Connect to Existing' to proceed.
Step 3: Select the Office 365 Archive mailboxes
- Select the archive mailboxes you want to migrate, then click 'Next' to connect to the target server.
- Select the archive mailboxes you want to migrate, then click 'Next' to connect to the target server.
Step 4: Connect to target Office 365 server
- To set up a new connection to the target Office 365, click 'Add New Connection.' If you want to use an existing connection, select it from the list and click 'Connect to Existing' to continue.
- Next, select the required connection options and click 'Next' to proceed.
- Select one of the secure OAuth 2.0-based modern authentication methods to connect to the target server, then click the 'Login' button to proceed.
- Authenticate on Microsoft sign-in page.
- Select a method to load the mailboxes, or use a CSV file to load them.
- To set up a new connection to the target Office 365, click 'Add New Connection.' If you want to use an existing connection, select it from the list and click 'Connect to Existing' to continue.
Step 5: Map source and target mailboxes
- Select the mapping option that best meets your needs.
- EdbMails provides automatic and manual mailbox mapping to associate source archive mailboxes with prepared destination shared mailboxes. The required shared mailbox should already exist in the target tenant before mapping; mapping does not provision the shared mailbox. Review the source-to-target association before starting migration.
- Select the mapping option that best meets your needs.
Step 6: Start Office 365 Archive mailbox to Shared mailbox migration
- Once the mailboxes are mapped, click 'Start Migration' button to begin the migration process.
- EdbMails will automatically start the migration and notify you when it's finished. To view the migration report, click the 'View Logs' button which provides a comprehensive report detailing the number of emails, folders, and mailbox items successfully migrated.
- Once the mailboxes are mapped, click 'Start Migration' button to begin the migration process.
Office 365 Archive mailbox to Shared mailbox post-migration activities
Step 1: Review migration status and logs
Review the EdbMails migration status and reports, then inspect the destination shared mailbox for the selected folders and migrated item scope.
Step 2: Validate destination access and configuration
Confirm that authorised users can access the destination shared mailbox and validate required Full Access, Send As, Send on Behalf, folder permissions, retention, hold, eDiscovery and other destination settings separately where they are required. Content migration does not by itself recreate these Microsoft 365 settings.
Office 365 Archive mailbox to Shared mailbox migration troubleshooting
See the Archive migration troubleshooting guide for possible solutions related to migration errors. For more information on EdbMails Office 365 migration refer to the frequently asked questions (FAQs).
Benefits of EdbMails for Office 365 Archive mailbox to Shared mailbox migration
- Map archive mailboxes to prepared shared mailboxes
EdbMails supports administrator-reviewable automatic and manual mapping between source archive mailboxes and existing destination shared mailboxes. Prepare the required shared mailbox in the target tenant first, configure the necessary access, and verify the mapping before migration.
- Plan migration with limited user disruption
EdbMails copies supported archive mailbox content to the prepared destination while administrators control the migration scope and schedule. User impact and migration duration depend on the environment, selected data, Microsoft service behavior and organisational cutover plan.
- Flexible migration scenarios (Cutover, Staged)
EdbMails ensures flexible migration that can be adopted based on the organizational requirements. Whether you require a cutover migration for immediate transfer or a staged migration for a phased transition, EdbMails provides the flexibility to meet different organisational requirements.
- Modern authentication
EdbMails supports OAuth 2.0-based modern authentication for Office 365 connections. Follow the documented registration method and Microsoft sign-in flow for the source and target connections.
- Free trial option
EdbMails offers free trial for those who want to check the tool before investing in buying. The free trial allows administrators to evaluate EdbMails migration features, test performance, and migrate up to 30 items per mailbox before purchasing a license.
