Share Nuget Package with different Azure DevOps Server over Upstream

Question

Summary:

• I am trying to get an Azure Artifact (NuGet Package) synchronized between two DevOps Projects using Feeds
• When both Projects belong to the same DevOps tenant i have no problems
• When i try to synchronize between two different tenants i get an error.

=> Is this doable in general or impossible?

I have the following setup:

Org A

• User A
• DevOps Server A (Needs external NuGet Package)
• Feed A

Org B

• User B
• DevOps Server B
• Feed B (external NuGet Package)

Is it possible to connect the feed of Org B to Org A with Azure custom Upstreams (Add Upstream -> Azure Artifacts feed in another organization -> azure-feed://OrgB/ProjectB/FeedB@Local -> NuGet -> Save)

If i want to save the Upstream Resources I always get the following error message: The source at 'azure-feed://OrgB/ProjectB/FeedB@Local' cannot be configured as an upstream because it does not exist or you do not have permissions to it.

I tried giving access to User A to Org B but it does not work. Is this even possible (in a technical sense)? If not, what is the best way to share a NuGet Package with a different Organisation (different Azure DevOps Server)? I do not want to be dependent on a server in Org B. Best case is the NuGet Package is mirrored in Org A. In the unlikely event that the server or Azure DevOps from Org B is down, the build in Org A still works.

1. I invited User A to DevOps Server B. (https://learn.microsoft.com/en-us/azure/devops/organizations/accounts/add-external-user?view=azure-devops)
2. Added User A to Feed B (https://learn.microsoft.com/en-us/azure/devops/artifacts/feeds/feed-permissions?view=azure-devops)

Answer 1

Add upstream source needs to be in the same Azure Active Directory.
Besides , you use service connection->nuget->External Azure Server to share Nuget Package.