Retrieving SiteId from Microsoft Graph for Subsequent API Calls This post offers an option to retrieve a SiteId from Microsoft Graph using PnP PowerShell. This can be particularly useful when making further API calls that require the SiteId. $siteurl = "https://contoso.sharepoint.com/sites/Company311" Connect-PnPOnline -url $siteurl -interactive # for the site url https://contoso-admin.sharepoint.com/teams/app-m365 # Extract the domain and site name $uri = New-Object System.Uri($siteurl) $domain = $uri.Host $siteName = $uri.AbsolutePath # Construct the new URL $RestMethodUrl = "v1.