Planner and Project Plan 3 license insufficient to open a .mpp files

Question

Hello,

We are using a Microsoft 365 GCC tenant and currently have a Planner and Project Plan 3 license assigned. However, we are unable to open .mpp files. The only application available to us is the Planner app; there is no Project application accessible.

Based on our research, the Planner and Project Plan 3 license does not include the Project desktop client, and it appears that Project Plan 3 by itself is insufficient in our GCC tenant to open .mpp files. How can we open .mpp files? Do we need an additional license?

Thank you

Answer 1

To open .mpp files, you need the Microsoft Project Online Desktop Client, which is not included with the Planner and Project Plan 3 licenses. The Project Plan 3 license allows access to Project for the web, but it does not provide access to the desktop client necessary for opening .mpp files directly.

To resolve this issue, you will need to acquire a Project Plan 5 license, which includes the Project Online Desktop Client. This will enable you to open and work with .mpp files on your GCC tenant.

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References:

• Microsoft Project Online desktop client service description
• Project architecture overview

Answer 2

Dear @LM-5132,

Thank you for reaching out to the Microsoft 365 Q&A forum. We understand you are unable to open .mpp files in your Microsoft 365 GCC environment despite having the Planner and Project Plan 3 license. This issue is often encountered in GCC tenants due to specific licensing configurations, and we’re here to help clarify and resolve it. 

In GCC environments, the Planner and Project Plan 3 license includes: 

• Project for the web (accessible through the Planner app interface) 
• Project Online (web-based) 
• However, the Project desktop application required to open .mpp files locally is not included in this license within GCC. 

For further details on these steps, you can refer to the official Microsoft support guide: Microsoft Project service description - Service Descriptions | Microsoft Learn 

Please follow these targeted steps to resolve the issue: 

Option 1: Use Project Online (Web-based) 
You can upload, edit, and manage .mpp files directly through Project Online, which is included in your current license. 

• Navigate to: https://project.microsoft.com (GCC-specific URL if applicable) 
• Upload your .mpp file and work within the browser. 

Option 2: Upgrade to Project Plan 5 (For desktop access) 
If local .mpp editing is essential, please ask your IT administrator to procure and assign Project Plan 5 licenses. This plan includes the full Project desktop application for GCC users. 

For further details on these steps, you can refer to the official Microsoft support guide: Project for the web and Project Online desktop client - Microsoft Support – Explains the difference between web and desktop versions, including .mpp file support. 

Please let me know if you have any further questions or if the problem persists after trying these solutions. Thank you for your patience and cooperation.

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