Microsoft project management software used to plan, manage, and communicate a project schedule and other information among workgroup members, project managers, and other stakeholders.
Hello AnupPereira-2467
Thank you for your detailed question and for providing the background behind your Planner Premium deployment strategy.
After reviewing your scenario, I believe this discussion is moving beyond Planner usage itself and into Power Platform and Dataverse architecture/governance. Since Planner Premium is built on Dataverse, questions about dedicated environments, environment selection, migration between environments, backup strategies, and governance typically require expertise in Power Platform administration and Dataverse deployment.
I would also recommend reviewing the following Microsoft article, as it contains useful information and deployment into non-default environments: Deploying Project for the web - Project for the web | Microsoft Learn
Unfortunately, I was unable to find official Microsoft documentation that definitively answers all of your questions, particularly around making a dedicated environment the default experience for Planner Premium within Teams or moving existing Premium plans between environments. Because of that, I don't want to speculate and risk providing inaccurate guidance.
Since this forum primarily focuses on Microsoft 365 and Office 365 products, I believe you would receive more accurate and authoritative answers from the Power Platform Community, where Power Platform administrators, Dataverse specialists, and solution architects are actively participating: Find Answers | Microsoft Power Platform Community
The experts there are much more likely to have practical experience with Planner Premium running in dedicated Dataverse environments and can provide guidance on governance, environment strategy, ALM considerations, and migration scenarios.
Alternatively, because your questions involve architecture and production deployment considerations, you may also wish to open a Microsoft support case through Admin Center. This would allow Microsoft engineers to review your specific environment and provide recommendations based on your tenant configuration and intended governance model: Get support - Microsoft 365 admin
I apologize that I cannot provide a more definitive answer here. Given the Dataverse-specific nature of your questions, I believe the Power Platform community or a Microsoft support engineer will be in a much better position to provide precise guidance and help you determine the most appropriate approach for your organization.
Kind regards,
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