You were right, Quota is the first thing to check. With Azure Spot VMs there are few more limitations that are not all visible and clear.
- Which type of Azure Subscriptions are you using? For example, it won't work with MSDN subscriptions. For CSP, you need to contact your Partner so that they can enable this for you. You can identify the details under "Subscription", then look for "Offer ID" and match it here: https://azure.microsoft.com/en-us/support/legal/offer-details/
- Some VMs are not available, B Series and any VM on "sales" (promo)
Just to be 100% clear, how did you try to deploy them on the Azure Portal? Using a Template or just by going to "create a VM" on the portal?
--I hope this helps. Please Accept it as an answer and "Up-Vote" the answer or message(s) that helped you so that it can help others in the community looking for help on similar topics
Regards,
Didier3001