Outlook Add in Error - Identity API

Question

Outlook Add in Error - Identity API

Sam Dowson 0

getAccessToken - 'The identity API is not supported for this add-in.' My Custom Add in taskpane shows and it is functional but when getAccessTokem is called throws an error.

Marten Theunissen 676 Reputation points

2025-03-24T11:42:16.9366667+00:00
Good day,

If OfficeRuntime.auth.getAccessToken is not supported, try using Office.auth.getAccessToken instead.

Here’s an example:

Office.auth.getAccessTokenAsync({ forceConsent: true }, function(result) {

if (result.status === "succeeded") {

console.log("Access token:", result.value);

} else {

console.error("Error:", result.error.message);

}

});
Sam Dowson 0 Reputation points

2025-03-24T12:15:08.3166667+00:00
Office.auth.getAccessToken({ forceConsent: false }, (result)

OSF.DDA.Error {name: 'API Not Supported', message: 'The identity API is not supported for this add-in.', code: 13000}

code: 13000

message: "The identity API is not supported for this add-in."

name: "API Not Supported"

OfficeRuntime.auth.getAccessToken({ forceConsent: false }, (result)

OSF.DDA.Error {name: 'API Not Supported', message: 'The identity API is not supported for this add-in.', code: 13000}

Both are producing the same error
Sam Dowson 0 Reputation points

2025-03-25T11:03:01.38+00:00

Thank you for your support on this issue, Because getAccessToken is no longer supported in Outlook Nested app authenication is necessary. https://learn.microsoft.com/en-us/office/dev/add-ins/develop/enable-nested-app-authentication-in-your-add-in
SokiGuo-MSFT 31,526 Reputation points Microsoft External Staff

2025-03-26T07:38:26.61+00:00

Hi @Sam Dowson

Thanks for sharing! Due to the strategy of the forum, it is not possible to receive the author's own answer, so I have summarized this question briefly in the answer below so that people who have the same question can refer to it.

2 answers

Your answer

Marten Theunissen 676 Reputation points

2025-03-24T11:42:16.9366667+00:00

Good day,

If OfficeRuntime.auth.getAccessToken is not supported, try using Office.auth.getAccessToken instead.

Here’s an example:

Office.auth.getAccessTokenAsync({ forceConsent: true }, function(result) {

if (result.status === "succeeded") {

console.log("Access token:", result.value);

} else {

console.error("Error:", result.error.message);

}

});
Sam Dowson 0 Reputation points

2025-03-24T12:15:08.3166667+00:00

Office.auth.getAccessToken({ forceConsent: false }, (result)

OSF.DDA.Error {name: 'API Not Supported', message: 'The identity API is not supported for this add-in.', code: 13000}

code: 13000

message: "The identity API is not supported for this add-in."

name: "API Not Supported"

OfficeRuntime.auth.getAccessToken({ forceConsent: false }, (result)

OSF.DDA.Error {name: 'API Not Supported', message: 'The identity API is not supported for this add-in.', code: 13000}

Both are producing the same error
Sam Dowson 0 Reputation points

2025-03-25T11:03:01.38+00:00

Thank you for your support on this issue, Because getAccessToken is no longer supported in Outlook Nested app authenication is necessary. https://learn.microsoft.com/en-us/office/dev/add-ins/develop/enable-nested-app-authentication-in-your-add-in
SokiGuo-MSFT 31,526 Reputation points Microsoft External Staff

2025-03-26T07:38:26.61+00:00

Hi @Sam Dowson

Thanks for sharing! Due to the strategy of the forum, it is not possible to receive the author's own answer, so I have summarized this question briefly in the answer below so that people who have the same question can refer to it.

Answer 1

Sure,

lets dig in.

Provide and confirm some of the below

outlook version

win version

ad connected azure connected

Addin Function

Ensure that the platform you're using supports the identity API. The OfficeRuntime.auth.getAccessToken method is supported in Excel, Word, and PowerPoint, but may not be supported in Outlook.

confirm necessary configurations for Single Sign-On (SSO)

Confirm your app permissions like User.Read, Files.Read.All, etc

Confirm Manifest file details

review logs under "Application," "Security," and "System" to find relevant events for failed events

https://github.com/OfficeDev/office-js/issues/5420

https://learn.microsoft.com/en-us/office/dev/add-ins/testing/testing-and-troubleshooting

https://answers.microsoft.com/en-us/outlook_com/forum/all/outlook-add-in-365-api-is-not-supported-on-this/679677f5-bca0-4fc6-8d28-c203835c311f

Answer 2

Hi @Sam Dowson

Thanks for the sharing.

However, due to a recent update in forum policy, the question author now is not able to accept their own answers.

So I have written a brief summary of the solution this issue. Please feel free to accept it as the answer, which would benefit others who also has similar issues in forum.

[Outlook Add in Error - Identity API]

Issue: getAccessToken - 'The identity API is not supported for this add-in.' My Custom Add in taskpane shows and it is functional but when getAccessTokem is called throws an error.

Solution:

Because getAccessToken is no longer supported in Outlook Nested app authenication is necessary. https://learn.microsoft.com/en-us/office/dev/add-ins/develop/enable-nested-app-authentication-in-your-add-in

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

SokiGuo-MSFT 31,526 Reputation points Microsoft External Staff

2025-04-01T05:44:36.6033333+00:00

Hi @Sam Dowson

Due to a recent update in forum policy, please consider accepting the answer to help increase visibility of this question for other members of the Microsoft Q&A community. If not, please let us know what is still needed in the comments so the question can be answered. Thank you for helping to improve Microsoft Q&A!

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Outlook Add in Error - Identity API

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