Hello @nimi ,
I have discussed internally, and VMSS is not tested for sharepoint farm. Hence it is not listed as supported or unsupported in the document. Sharepoint team is working on testing it, we shall have the document updated after the testing is done.
I was able to create a SharePoint Server farm with VMSS on azure. I am unsure of the implications in production environment. If you have the ability to do dev/test setups, I would suggest you to test your sceanrio accordingly with required configuration.
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