How do i find a site's name using 'site_id'?

Hi @Edward, 

I hope you’re having a great day. I appreciate your patience and the details you provided. 

A straightforward way to find which site it refers to is to query Microsoft Graph for that site and read the returned webUrl (the actual SharePoint site URL) and display name.  

You may choose one of the options below that best suits your needs. 

Option A - Microsoft Graph (recommended if the site_id is in Graph format): 

You can retrieve the site details (including webUrl) by calling: 

GET https://graph.microsoft.com/v1.0/sites/{site-id} 

This returns the site properties and the SharePoint URL in webUrl. 

Option B - If you only have a GUID and need a tenant-wide lookup: 

If the ID you have is a GUID and you need to map it back to a site collection, admins can use PnP PowerShell at the tenant admin level to look up the site by its Id. 

For additional information, you can refer to these articles:  

• Get a SharePoint Site - Microsoft Graph v1.0 | Microsoft Learn 
• Get-PnPTenantSite | PnP PowerShell 

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In case you require more in-depth guidance or support for these steps, I’d recommend posting your query in the Microsoft Power Automate Community. This is a dedicated channel for Power Automate discussions. The reason I suggest posting a new topic there is that in the general Q&A Forum, resources and expertise on Power Automate are limited. In the Microsoft Power Platform Community Forum, you’ll find the most qualified group of respondents, and other partners who regularly read the forums can share their knowledge or learn from your interaction. 

I hope this information is helpful. Should you have any further questions or need additional assistance, feel free to reach out.    

Thank you again for your understanding and cooperation. 

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A SharePoint Online site ID can be resolved to the actual site (and its name) by querying the site resource via Microsoft Graph or the SharePoint/OneDrive site API.

Two common approaches:

1. Using Microsoft Graph PowerShell (Get-MgSite)
   If the site ID is the Graph site-id (the composite ID), use the Microsoft.Graph.Sites module:

      # Connect first (for example with delegated permissions)
      Connect-MgGraph -Scopes "Sites.Read.All"
      
      # Replace {site-id} with the site_id value
      $site = Get-MgSite -SiteId '{site-id}'
      $site.DisplayName
      $site.WebUrl
   

   Get-MgSite “retrieves properties and relationships for a site resource. A site resource represents a team site in SharePoint.” The returned object includes properties such as the site’s display name and URL, which identify which SharePoint site the site_id refers to.
2. Using the Sites REST endpoint (Graph/OneDrive site API)
   If calling the API directly, use the GET /sites/{site-id} pattern:

      GET /sites/{site-id}
   

   As documented for “Get a site resource”, this returns the site resource for that ID, including its name and URL. A site is addressed by a unique composite ID, and GET /sites/{site-id} resolves that ID to the actual SharePoint site.

Once the site resource is retrieved by either method, inspect its name/displayName and webUrl to know which SharePoint Online site the site_id represents.

References:

• Get-MgSite
• Get a site resource