SharePoint Guest Users API Access - Unauthorized
Hello, we've build an Azure AD App that uses MSAL to authenticate against SharePoint. The auth flow works fine, till we try to access SharePoint resources with guest users. We've tried several solutions and configurations but we always get the answere: "Exception of type 'Microsoft.IdentityModel.Tokens.AudienceUriValidationFailedException' was thrown." Is there any policy that does not allow guest users to access sharepoint through the sharepoint api? Direct access to sharepoint works without a problem. Thanks in advance Michael