O365 Sharepoint Online First Time Setup - Error is: The remote server returned an error: (401) Unauthorized.

Question

11.28.126

O365 Sharepoint Online First Time Setup - Error is: The remote server returned an error: (401) Unauthorized.

This appears in the CVSPAutoDiscoverScan.log on the O365 ‘Access Node’

We have setup a new Azure App, to backup Sharepoint Online for a customer, the Azure App appears as Authorized

But we unable to get any Content, when I try ‘Add Sites’, we receive the following message - now my Azure guys tell me 1 and 2 are fine, so we go to three - the kb article refers to this command

Set-SPOTenant -DisableCustomAppAuthentication $false

Which my Azure guys tell me is now retired

I’m hoping someone has had this pain before and knows a workaround

Thanks

Syed_S · Accepted Answer

Hi ​@jracjdb2,SharePoint site discovery is getting failed with the below error:Failed to validate any of the configured Azure Apps against the SharePoint Tenant Admin siteThere could be two causes for this error:SharePoint App principal failed/Not updatedSharePoint Auto-discovery did not run after changes to AppResolutionCreate app principal for the Azure app.Referhttps://documentation.commvault.com/2024/essential/create_app_principal_for_sharepoint_online.htmlConfirm that the sites are discovered, and it is displayed in the Add content.

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