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I have to create an calendar event in Outlook 365 from SharePoint Online. I know that I can achieve this using https://graph.microsoft.com/v1.0/me/events call in Microsoft Graph API.

The only problem I am facing is in authentication. Can I use the token from SharePoint Online and authenticate Outlook 365 and create an event there? If yes, then how can I get that token and use that for authenticating outlook 365 for Microsoft Graph API?

I don't want any more sign in window to authenticate.

Any suggestions are most welcome.

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  • 1
    Have you been able to figure out any work around for this problem?
    – Farhan
    Mar 9, 2019 at 16:06
  • I actually ended up using Sign-In window to get the authentication token.
    – Aakash Maurya
    Mar 11, 2019 at 4:16

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@Aakash Maurya,

I think it's possible to avoid prompting login window again. You can take a reference of OAuth 2.0 On-Behalf-Of flow:

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And another possible solution is to use refresh token:

Although access token only against one resource, its refresh token is valid for all permissions that your client has already received consent for - thus, a refresh token issued on a request for scope=mail.read can be used to request a new access token for scope=api://contoso.com/api/UseResource.

BR

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