Can I have multiple Azure DevOps organisations with MSDN Subscription?
The short answer is NO.
Visual Studio Enterprise and Azure devops are two different products that have their own licenses, they could not share a licenses.
Besides, you can have multiple Azure DevOps organisations for free, but the free tier of resources in your organization is restricted, the Free tier includes:
- Five Azure DevOps users (Basic).
- Five Azure Artifacts users.
- Free Tier of Microsoft-hosted CI/CD (one concurrent job, up to 30 hours per month).
- One self-hosted CI/CD concurrent job.
- 20,000 virtual user minutes of cloud-based load testing.
When you need more than the free tier of resources in your organization, or to buy other features for your users that are offered by Microsoft or other companies via the Visual Studio Marketplace, on the Azure DevOps tab, you need buy a subscription to bill that Azure DevOps instance.
Check following threads for some more details:
Billing overview for Azure DevOps
Pricing for Azure DevOps
Compare features between plans
Hope this helps.