Explanation
Assign the delegated provider role to User1.
Delegation steps
There are two steps to setting up delegation:
1. Create a delegated provider subscription: Subscribe a user to an offer containing only the subscription service. Users who subscribe to this offer can then extend the delegated offers to other users by signing them up for those offers.
2. Delegate an offer to the delegated provider: This offer enables the delegated provider to create subscriptions or to extend the offer to their users. The delegated provider can now take the offer and extend it to other users.
Note:
Move subscriptions between delegated providers
If needed, a subscription can be moved between new or existing delegated provider subscriptions that belong to the same directory tenant. You can move them using the PowerShell cmdlet Move-AzsSubscription.
Moving subscriptions is useful when:
* You onboard a new team member that will take on the delegated provider role and you want to assign to this team member user subscriptions that were previously created in the default provider subscription.
* You have multiple delegated providers subscriptions in the same directory tenant (Azure AD) and need to move user subscriptions between them. This scenario could occur when a team member moves between teams and their subscription must be allocated to the new team.
Reference:
https://learn.microsoft.com/en-us/azure-stack/operator/azure-stack-delegated-provider