CORS issue while access the sharepoint file via in microsoft grap api in web application

Question

Hi Team ,

Reg : Cors issue get the web application access O365 document

We have the web application to integrated with o365 document application,
For o365 document access happen via Microsoft graph API call in our application ,
While login a user via sso , we took the Access token then API call access to the SharePoint document .
While access the o365 document , we got the CORS issue in the server

Clarification :

we need to configure any other permission API [Delegate and Graph API] ?

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://login.microsoftonline.com/8887b081-7603-4489-8f21-3e1e10ac318e/oauth2/v2.0/authorize?state=b3db04cab16b4e04dbc24f6e08176703&scope=Files.Read%20Files.Read.All%20Files.Read.Selected%20People.Read%20Presence.Read%20Presence.Read.All%20profile%20User.Read%20User.Read.All%20ChatMessage.Send%20Chat.ReadWrite%20openid%20offline_access%20email&response_type=code&approval_prompt=auto&redirect_uri=https%3A%2F%2Ftvscloud.dev.betabasket.net%2Fo365%2Fcallback&client_id=4ccb587c-393e-409f-b96c-470b94a8f823. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 200.

Answer 1

Hi @testuser ,

Please check your permissions, according to my research and testing, if you want to access the SharePoint document, you need to have Sites.Read.All permission.

More information for reference:
https://learn.microsoft.com/en-us/graph/api/listitem-get?view=graph-rest-1.0&tabs=http#permissions

Hope it can help you. Thanks for your understanding.

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