When calling graph api to get customers for a certain calendar, I get a service exception that does not tell me much. This is from a calendar from which I can get the availability and the staffmembers without any issue, yet the following code returns the error below Calendar is the email of the calendar, and getGraphClient looks like this: Application has the correct permissions: Microsoft.Graph.ServiceException: 'Message: An error has occurred. Inner error: AdditionalData: date: 2022-11-02T09:16:14 request-id: 2d05a5e0-efd1-4694-b221-1648a526ebc3 client-request-id: 2d05a5e0-efd1-4694-b221-1648a526ebc3 ClientRequestId: 2d05a5e0-efd1-4694-b221-1648a526ebc3 '

Hello @Anonymous , Thanks for reaching Microsoft Q&A! It appears you are using Application permission (client secret credential flow), currently GET /solutions/bookingBusinesses/{id}/customers supported only with delegated permissions, please refer to bookingbusiness-list-customers . Also, refer to Get access on behalf of a user . Hope this helps. If the answer is helpful, please click " Accept Answer " and kindly upvote it. If you have extra questions about this answer, please click " Comment ".

BookingBusiness Customers GetAsync returns error

Accepted answer

Srinivasa Rao Darna 6,686 Reputation points Microsoft Vendor

2022-11-02T17:02:13.143+00:00

Hello @Anonymous ,

Thanks for reaching Microsoft Q&A!

It appears you are using Application permission (client secret credential flow), currently GET /solutions/bookingBusinesses/{id}/customers supported only with delegated permissions, please refer to bookingbusiness-list-customers.

Also, refer to Get access on behalf of a user.

Hope this helps.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
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1 person found this answer helpful.
Anonymous

2022-11-03T11:47:00.323+00:00

Forgot to include that in the screenshot, but delegated permissions have also been applied.

Should I remove the application permission?

Anonymous

2022-11-03T11:47:52.78+00:00

And this is the application Permission

Anonymous

2022-11-03T11:55:15.957+00:00

Also:
Get access on behalf of a user won't work in my usecase. An external user will be using an interface to create a booking with one of our technicians. These external users will not be able to log in with a Microsoft account because they might not have one.

I am using getcustomers to review whether or not the customer already exists or not before trying to create the customer, in order to make a booking.

Seems that you are indeed correct about the application permissions though, but it seems very weird to me that there's application permissions for:
-Getting by ID
-Updating
-Deleting
While you can't even list the customers or create them? How would you even ever get a customer ID to use the get functionality if you can't list the customers?

Srinivasa Rao Darna 6,686 Reputation points Microsoft Vendor

2022-11-03T12:07:40.21+00:00

Thanks for confirming you have granted Microsoft Graph delegated permissions.
You have to correct your code as you are using ClientSecretCredentials, which will be using appId and appSecret to generate accessToken, you should be change your code to get accessToken on behalf of user.

Refer: https://learn.microsoft.com/en-us/graph/auth-v2-user

you can use any user OAuth grant flow such as:

https://learn.microsoft.com/en-us/graph/sdks/choose-authentication-providers#authorization-code-provider
https://learn.microsoft.com/en-us/graph/sdks/choose-authentication-providers#device-code-provider
https://learn.microsoft.com/en-us/graph/sdks/choose-authentication-providers#interactive-provider

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

Srinivasa Rao Darna 6,686 Reputation points Microsoft Vendor

2022-11-03T12:11:22.667+00:00

As it is not supported currently with Application permissions request you to create feature request in graph feedback portal, that will be monitored by Microsoft Product Engineering teams and will be considered for implementation based on number of votes received and people requesting for the same.

Hope this helps.
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BookingBusiness Customers GetAsync returns error

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