Work with SharePoint's REST API

Question

Hi,

To perform actions across all SharePoint sites within my Tenant using Power Automate, The SharePoint HTTP action can interact with SharePoint's REST API to perform operations on a single site only. So To extend this to all sites, I would typically need to work with SharePoint REST API.

To do so: i've registered a new APP, but when I try to set the permissions so that i can apply the full control Right It leads me to to an error message (Sorry it's in French)

i'm using the following WML code:

<AppPermissionRequests AllowAppOnlyPolicy="true">

<AppPermissionRequests Scope="http://sharepoint/content/sitecollection/web"

Right="FullControl"/>

</AppPermissionRequests>

<AppPermissionRequests AllowAppOnlyPolicy="true"><AppPermissionRequests Scope="http://sharepoint/content/sitecollection/web"Right="FullControl"/></AppPermissionRequests>

Thanks for your help.

Answer 1

Hi @Mohammed OUAHI,

For new tenants, apps using an ACS app-only access token is disabled by default. You can change the behavior by running set-spotenant -DisableCustomAppAuthentication $false (needs the latest SharePoint admin PowerShell).

Then you should check if you are using the right url to register the app only. The url should be like following

https://contoso.sharepoint.com/sites/sitename/_layouts/15/appregnew.aspx

https://contoso-admin.sharepoint.com/sites/sitename/_layouts/15/appinv.aspx

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