Hi ​@De Cock I'm pretty sure it should. You can reference more info in the User Guide where it talks about VDC & immutability.

https://helpcenter.veeam.com/docs/backup/vsphere/data_cloud_limitations.html?ver=120

I found the VDC User Guide but nothing in it regarding immutability.

https://helpcenter.veeam.com/docs/vdcv/userguide/welcome.html

As it's just another Cloud object storage, I'm pretty sure it's the same as in the Guide I shared. 

​@coolsport00 Thanks you for your reply but for me it isn’t still clear.
I don’t see it anywhere written black on white. Not even in the guide

From the link I VDC limitations shared:

"Veeam Data Cloud Vault. You cannot disable immutability and cannot remove data during this period. You can modify the immutability period when you configure Veeam Data Cloud Vault." 

That bullet item then has links to Immutability sections for Objects Storage which discuss retention. 

https://helpcenter.veeam.com/docs/backup/vsphere/immutability_object_storage_repositories.html?ver=120

https://helpcenter.veeam.com/docs/backup/vsphere/veeam_data_cloud_details.html?ver=120

Hope that helps 

​@De Cock -

Sorry I couldn’t provide more detail in my comments earlier..I was sidetracked with a couple other things at the time 

Basically, the Hyper-V link you shared is the same as the vSphere link I shared just above. You are spot on for retention. VDC is Azure underneath the hood, and thus Cloud-based Object Storage. Both HV and VMW Guides link to the Object Storage Immutability sections which discuss retention for Immutability.

The section in the link discusses “Actual Retention”:

https://helpcenter.veeam.com/docs/backup/hyperv/hiw_immutability_os.html?ver=120#object-storage-actual-retention , which references Block Generation and how it’s added & used for actual immutability retention:
Actual retention = job retention policy + immutability period + Block Generation period

So for example, whatever you configure for the Job, add the Immutability period, then an additional 10 days (non-AWS or IBM Cloud storage) for Block Generation and that is your immutability period. 

I get that you’d like the VDC section of the Guide to explicitly state that...I’m the same way  But, that area just references the Object Storage immutability sections by placing links in its section so as to not duplicate text is my guess.

Hope that better explains.

Hi ​@De Cock - did you get an answer to your question and if so can you please share so we can mark an answer as “Best Answer” even if it is yours.