Permissions - AppFlow Connection to SharePoint Site

Question

Hi All.

I'm following this guide: https://docs.aws.amazon.com/appflow/latest/userguide/connectors-microsoft-sharepoint-online.html

The AppFlow appears to be requesting broad access to our Azure/SharePoint tenant and I'd like to limit access to a single SharePoint site and/or document library. I configured a MS Graph API connection using Sites.Select to limit the SharePoint site scope, but configuring the AppFlow still wants broad access to SharePoint. This is noted in the "Requirements for using your own app registration (optional)" section of the link above.

Any advice on limiting permissions or another approach?

Thanks!

Aaron Rose · Answer

Hi BA,

I understand you’re looking to limit the permissions AWS AppFlow requests when connecting to a Microsoft SharePoint site. It sounds like you’ve already scoped permissions using `Sites.Select` but AppFlow is still requesting broader access. Let’s tackle this together.

### Clarifying the Issue  
AWS AppFlow connects to SharePoint Online via the Microsoft Graph API. While `Sites.Select` helps restrict access to specific sites, AppFlow may still require `Sites.ReadWrite.All` to ensure a seamless integration. This behavior can pose challenges for organizations aiming to enforce stricter security controls.

### Key Terms  
- **AppFlow**: An AWS service for transferring data between SaaS applications (like SharePoint) and AWS.  
- **Microsoft Graph API**: A RESTful API that enables interaction with Microsoft 365 services, including SharePoint.  
- **Sites.Selected**: A scoped permission limiting an app’s access to only specified SharePoint sites.  
- **Azure AD App Registration**: A process in Azure Active Directory that allows applications like AppFlow to authenticate and interact with SharePoint.

---

### The Solution (our Recipe)

1. **Use `Sites.Selected` to Scope Down Access**  
   - In Azure AD, confirm your AppFlow app registration has `Sites.Selected` permissions.  
   - Use PowerShell to **manually grant access** to specific sites:  
     ```powershell
     Connect-AzureAD  
     Grant-AzureADAppPermission -AppId "" -SiteId "" -Permissions "Sites.Selected"
     ```  
     Replace `` with your app registration ID and `` with the target SharePoint site ID. This ensures AppFlow interacts only with the designated site.

2. **Test AppFlow Integration**  
   Validate AppFlow’s ability to pull data from the scoped SharePoint site. If it throws permission errors, AppFlow may still require `Sites.ReadWrite.All` to function as intended.

3. **Workaround: Use an Intermediate Storage**  
   If limiting permissions strictly is non-negotiable:  
   - **Manually pull data**: Use the Microsoft Graph API (scoped to `Sites.Selected`) to extract data from the specific SharePoint site.  
   - **Store it in Amazon S3**: Upload the extracted data to S3 for further processing.  
   - **Integrate with AppFlow**: Configure AppFlow to process this sanitized S3 data instead of directly accessing SharePoint.

4. **Review AWS Documentation**  
   Refer to [AWS AppFlow User Guide](https://docs.aws.amazon.com/appflow/latest/userguide/connectors-microsoft-sharepoint-online.html) for the most up-to-date AppFlow and SharePoint integration requirements.

---

### Closing Thoughts  
While AWS AppFlow simplifies SharePoint data transfer, its reliance on Microsoft Graph API permissions can limit fine-grained control. Leveraging `Sites.Selected` narrows access but may require careful configuration. If strict permission boundaries are essential, an intermediate storage approach offers a robust workaround.

Let me know if you’d like more help implementing these steps—I’m happy to dive deeper into PowerShell or AWS AppFlow configurations!

Cheers, and happy building! 😊

Aaron! 🚀

Permissions - AppFlow Connection to SharePoint Site

Clarifying the Issue

Key Terms

The Solution (our Recipe)

Closing Thoughts

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