What value to set in <Resource> section in the "WebApplicationInfo" element in Outlook Add-In manifest for "Office.context.auth.getAccessToken".

Question

What value to set in <Resource> section in the "WebApplicationInfo" element in Outlook Add-In manifest for "Office.context.auth.getAccessToken".

Suraj Sinha 10

This is to seek inputs on how to configure the "WebApplicationInfo" section in the manifest file of an Outlook Add-In.

We have developed a ReactJS, web-based, Outlook Add-In, using Microsoft JavaScript Office APIs.
The Outlook Add-In is hosted on the URL https://cmicpublish.cmicglobal.com/cmicdev/outlookplugin/.
The URL of the landing page of the Add-In being https://cmicpublish.cmicglobal.com/cmicdev/outlookplugin/taskpane.html.
Now, we want to call the "Office.context.auth.getAccessToken" Office API, to retreive an authentication for calling Microsoft Graph APIs.
For this, it is required to add a new "WebApplicationInfo" section in the manifest file of the Outlook add-in, like this:

https://learn.microsoft.com/en-us/javascript/api/manifest/webapplicationinfo?view=common-js-preview

<Resource>api://contoso.com/12345678-abcd-1234-efab-123456789abc</Resource>

<Scope>Files.Read.All</Scope>

<Scope>offline_access</Scope>

<Scope>openid</Scope>

<Scope>profile</Scope>

</Scopes>

</WebApplicationInfo>

Question For our case, as explained above, what should be the value in the <Resource> XML section.

2 answers

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Answer 1

Hello Suraj Sinha,

Thank you for reaching out to Microsoft Support!

According to the documentation, the value of <Resource> is the Application ID URI of the add-in as registered in the Azure Active Directory v 2.0 endpoint.

The Application ID URI is set when we register the application, as shown below, see the documentation for details.

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Hope this helps.

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Answer 2

Hi @Anonymous

What should we use for the Application ID URI?
Should it be the URL where our Outlook add-in is hosted or the URL of any server-side API's?

This question arises because we're unable to sideload manifest file if the Resource value is anything other than the URL where our Outlook add-in is hosted.

In our case, the add-in is hosted at "https://cmicpublish.cmicglobal.com/cmicdev/outlookplugin" We can only sideload the add-in when the **WebApplicationInfo** element matches what’s shown in the snapshot; otherwise, installation get failed.
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What value to set in <Resource> section in the "WebApplicationInfo" element in Outlook Add-In manifest for "Office.context.auth.getAccessToken".

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