Not able to fetch data from SharePoint Online List using Postman tool

Copper Contributor


I followed the process to fetch the data from SP online list using Postman tool:

- Register a new app.

- Generate client id and secret.

- Grant permission

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

- Trust the app.

Now in Postman

- Generate access token =>

- add following properties in body section


- Generate access token. Received successfully.

- Pass this token as "Bearer accessToken".

But now I am facing issue as "{"error":"invalid_request","error_description":"Token type is not allowed."}".

Please guide me, what wrong I am doing here. This SP site is a developer account subscription.

3 Replies

Hi @Nj-SharePointDeveloper 

ACS and SharePoint "ClientID" and "Secret" authentication is kind of old.
You need to re-activate it on new tenants using PowerShell as a SharePoint Admin.

It looks like this if you use PnP-Powershell

Connect-PnPOnline https://<yourtenant> -Interactive
Set-PnPTenant -DisableCustomAppAuthentication $false

 Then your Postman request will work.

But ACS  is the "old" method...
You should take a look at Azure AD Apps and the "Sites.Selected" permission. 

Best Regards,

Error after running above command  The resource principal named https:// was not found in the tenant named "....". This can happen if the application has not been installed by the administrator of the tenant. etc etc

best response confirmed by Nj-SharePointDeveloper (Copper Contributor)

Hi @Nj-SharePointDeveloper 

When exactly did you get that error?


  • After executing the Powershell command?
    • After the login using "Connect-PnPOnline"?
    • After executing the "Set-PnPTenant" command?
  • After acquiring the token? (From
  • After executing a SharePoint REST request?

If it occurs during the login using "Connect-PnPOnline" try to execute the following command once before


That registers the PnP Powershell as an app in your tenant.

Best Regards,