Change VM MoRef in VBR database

This information can be found in many other places on the big internet, but since I can never find it myself, I will make a post more about the procedure.

When you switch ESXi host, vCenter, or remove and add from inventory your VM will get a new ID. In the world of VMware, it’s called MoRef ID.

When this happens Veeam will lose its coupling to the VM and backup will fail with:
– Virtual Machine <> is unavailable and will be skipped from processing.
– Nothing to process. All machines were excluded from task list.

How to verify there is a MoRef mismatch:

From a VMware perspective it’s easy:

connect-viserver <vcenter> -Credential $cred
Get-VM | select name, id

This will give you something like:

PS C:\Windows\system32> Get-VM | select name, id
Name Id
---- --

From Veeam perspective it’s a bit harder since you will need to query the MS SQL database that Veeam uses. So download the SQL Studio Manager from Microsoft.

Open the SQL Studio Manager as administrator on the server to gain access to the Veeam database. You can use the following query to find the MoRef that is in the Veeam database:

SELECT [dbo].[BObjects].id, [dbo].[BObjects].object_id, [dbo].[BObjects].host_id, [dbo].[BObjectsSensitiveInfo].object_name, [dbo].[BObjectsSensitiveInfo].path
FROM [dbo].[BObjects]
INNER JOIN [dbo].[BObjectsSensitiveInfo] ON [dbo].[BObjectsSensitiveInfo].bObject_id=[dbo].[BObjects].id  
WHERE object_name = '<vmname>'


So we can now see that the VM in VMware has MoRef “vm-71326”. But Veeam database has “vm-992”. From here on you know what’s wrong and you need to open a Veeam support case to get the supported procedure.

If you don’t care about supported procedures you can update the database with VMware VM new MoRef ID and your VBR job should be running again. The SQL query would look like this:

UPDATE [dbo].[BOobjects]
SET [object_id] = 'new-id'
WHERE [object_id] = 'old-id'


It’s not that had to change the MoRef in the VBR database. But remember, if you care about having a supported installation. Then you need to create a Veeam support case and have them help you. Something could have changed in the VBR database schema since this post.