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  • Nikks
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I'm in the process of migrating our hosts and VMs from vCenter 7 to 8, maintaining the same EVC and cluster layout. During this migration, I understand there is a risk of breaking the backup chains due to potential new MOREF IDs. Is there a way to preserve the backup chains? Our jobs are mapped using vSphere Tags.

I will be carrying out this migration without powering off any VMs or hosts, and I want to ensure the backup chains continue without issues.

If I go to each job and remap or re-browse the VM objects by tags, will this preserve the backup chain and retention? If the backup chain isn't preserved and a new full backup is required, will the retention policy continue from where it left off?

Best answer by Dynamic

Hi ​@Nikks,

if you go with an inplace upgrade of your vCenter VCSA then you will be good to go. 
If you would go with a new VCSA deployment in parallel, and migrate your VMs for example by Cross migrate your VMs will get a new MORef ID. Then you should check for https://helpcenter.veeam.com/docs/backup/powershell/veeam_vm_migrator.html

 

hope this helps. Best, Markus

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    Dynamic
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    • Dynamic
    • Veeam Vanguard
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    • April 8, 2025

    Hi ​@Nikks,

    if you go with an inplace upgrade of your vCenter VCSA then you will be good to go. 
    If you would go with a new VCSA deployment in parallel, and migrate your VMs for example by Cross migrate your VMs will get a new MORef ID. Then you should check for https://helpcenter.veeam.com/docs/backup/powershell/veeam_vm_migrator.html

     

    hope this helps. Best, Markus

    Markus Hartmann | Veeam Vanguard | Veeam Legend 2024 | VMCA 2024 & VMCE 2024 | VMware Certified Implementation Expert - DCV 2024 | https://markushartmann.blog/
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    • Mohamed Ali
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    • April 8, 2025

    ​@Nikks  If you keep the VM names are same and VM tags are applied in new center, you can able to remap the backup jobs and it continues the same chain from the repository’s point of view. 

    If you create new backup without mapping the existing the chain, retention policies will still apply to the old chain and new chain independently. The old chain will remain available for restores and will age out gradually based on retention settings. 

    Mohamed Ali | VUG leader | VMCE 2024, VCP-DCV, CCP-V
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