There are two migration procedures listed below, which one you use will be depend on whether an object storage repository is in use.

Migrate Veeam Backup for Microsoft 365 Server without an Object Storage Repository

1. Install the same or newer version of the Microsoft Windows OS on the new server.
2. Install Veeam Backup for Microsoft 365 on the new server.
3. Stop all the Veeam Backup for Microsoft 365 services on the original server, before moving any data.
4. Copy the backup repository data to the backup repository location on the new server.
5. Add the same Microsoft Office 365 organization on the new server.
6. (Optional) Add a backup proxy from the original site to the new server:
   1. Stop all backup jobs that are running on the proxy.
   2. Open backup job settings and specify to use another proxy.
   3. Remove the proxy from the original Veeam Backup for Microsoft 365 console.
   4. Add the proxy to the new Veeam Backup for Microsoft 365 server.
      
      Note: Backup proxy server and Veeam Backup for Microsoft 365 server must be deployed within the same domain or within trusted domains.
7. Add the backup repository (from a new location).
8. Restore Points created on the original Veeam Backup for Microsoft 365 server can be accessed by right-clicking the corresponding organization.
9. Run a test restore from the organization using a restore point created on the original Veeam Backup for Microsoft 365 server to verify that you can recover data.

Migrate Veeam Backup for Microsoft 365 Server - with an Object Storage Repository

1. Before decommissioning the original server, make sure that the backup repository is removed from the configuration.
2. Build the new server using any supported Windows OS version from the list in this article under the OS specification.
3. Install Veeam Backup for Microsoft 365 or remotely deploy Veeam Backup for Microsoft 365 proxy on the new server.
4. Add the same storage account to the new server.
5. If you see the “Cannot override repository ownership because the object storage repository is locked” message and you no longer have access to the original server, navigate to the corresponding bucket/container and delete the object inside the RepositoryLock folder.
   Refer to this article for information on the structure of the Veeam Backup for Microsoft 365 object storage repository and how to locate the RepositoryLock folder.
6. Create a new backup repository and extend it with the needed storage account.
7. The created backup repository will be marked as Out of Sync, meaning that the metadata needs to be synchronized from the bucket/container to the persistent cache folder on a local disk.
   Click Yes to start synchronization immediately.
   Alternatively, the persistent cache folder can be synchronized manually as described in this article.
8. Add the same Microsoft Office 365 organization to the new server.
9. Run a test restore from the organization using a restore point created on the original Veeam Backup for Microsoft 365 server to verify that you can recover data.