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Go_Ozeki
Frequent Visitor

How to use Discovery Service API.

I would like to use the Discovery Service API, but even after referring to the following site, it does not work.

As a result, I get a Status 401 Unauthorized response.

https://docs.microsoft.com/en-us/powerapps/developer/data-platform/webapi/discovery-orgsdk-to-webapi

 

See the images below for Request and Response.

名称未設定 1.png

 

名称未設定 2.png

 

名称未設定 3.png

 

I followed the steps below with reference to MS Learn.

https://docs.microsoft.com/en-us/learn/modules/common-data-service-web-api/

 

  1. Register Dataverse App to Azure AD
  2. Modify Manifest in Microsoft CRM Portals
  3. Allow API access
  4. Generate OAuth 2.0 Access Token by Postman.
  5. Execute the WhoAmI function to check the Web API connection to Dataverse, and confirm that the response is Status 200 OK.
  6. As a result of executing the Discovery Service API, the status 401 Unauthorized was response.

 

Please let me know if I am missing some setting or if it is a tenant problem.

 

Thank you for help.

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
v-xiaochen-msft
Community Support
Community Support

Hi @Go_Ozeki ,

 

Is the permission of the app now the same as in the image?

vxiaochenmsft_0-1627893899986.png

 

Please check if your postman has selected the correct environment and check if your client id and callback are correct.

 

vxiaochenmsft_1-1627894117602.png

vxiaochenmsft_2-1627894225240.png

vxiaochenmsft_3-1627894310124.png

vxiaochenmsft_4-1627894696999.png

vxiaochenmsft_5-1627894715066.png

vxiaochenmsft_6-1627894761889.png

 

// Please use Bearer 

vxiaochenmsft_7-1627894830495.png

 

Best Regards,
Wearsky
If my post helps, then please consider Accept it as the solution to help others. Thanks.

 

 

 

View solution in original post

9 REPLIES 9
v-xiaochen-msft
Community Support
Community Support

Hi @Go_Ozeki ,

 

Their resources are different.

vxiaochenmsft_0-1627608685668.png

https://login.microsoftonline.com/common/oauth2/authorize?resource=https://globaldisco.crm.dynamics.com

vxiaochenmsft_1-1627608709737.png

 

Get its token and use it.

vxiaochenmsft_2-1627608760312.png

 

Best Regards,
Wearsky
If my post helps, then please consider Accept it as the solution to help others. Thanks.

 

 

Hi @v-xiaochen-msft,

 

I changed the AuthURL to the one you gave me, got the token, and tried again.
However, the result was the same: 401 Unauthorized.
What are the possible reasons for the 401 Unauthorized?

 

Thank you.

 

Go_Ozeki_0-1627622944588.png

Go_Ozeki_1-1627622949055.png

Go_Ozeki_2-1627622954097.png

 

v-xiaochen-msft
Community Support
Community Support

Hi @Go_Ozeki ,

 

Have you given your application enough permissions?

vxiaochenmsft_0-1627625120192.png

vxiaochenmsft_2-1627625184843.png

 

vxiaochenmsft_1-1627625172172.png

vxiaochenmsft_3-1627625201425.png

vxiaochenmsft_4-1627625222024.png

vxiaochenmsft_5-1627625233035.png

vxiaochenmsft_6-1627625271103.png

vxiaochenmsft_7-1627625319411.png

 

 

Best Regards,
Wearsky
If my post helps, then please consider Accept it as the solution to help others. Thanks.

 

 

Hi @v-xiaochen-msft,


I do not have permissions to work with Azure AD.
I will check with my system administrator later or get a developer subscription and try it out.

Thank you for help.

Hi @v-xiaochen-msft,

I got a developer subscription and tried the following steps.

 

1.Granted admin consent for my Environment.

Go_Ozeki_0-1627892710028.png

Go_Ozeki_1-1627892710033.png

 

2.Configured the Manifest.

Go_Ozeki_2-1627892729046.png

Go_Ozeki_3-1627892729048.png


3.Authentication was set to Multitenant.

Go_Ozeki_4-1627892747603.png


4.Postman settings.

Go_Ozeki_5-1627892765743.png

Auth URL:

https://login.microsoftonline.com/common/oauth2/authorize?resource=https://globaldisco.crm.dynamics.com

 

However, the result was the same: 401 Unauthorized.
Do I still need to configure something?

Go_Ozeki_6-1627892966287.png

 

Thank you for help.

v-xiaochen-msft
Community Support
Community Support

Hi @Go_Ozeki ,

 

Is the permission of the app now the same as in the image?

vxiaochenmsft_0-1627893899986.png

 

Please check if your postman has selected the correct environment and check if your client id and callback are correct.

 

vxiaochenmsft_1-1627894117602.png

vxiaochenmsft_2-1627894225240.png

vxiaochenmsft_3-1627894310124.png

vxiaochenmsft_4-1627894696999.png

vxiaochenmsft_5-1627894715066.png

vxiaochenmsft_6-1627894761889.png

 

// Please use Bearer 

vxiaochenmsft_7-1627894830495.png

 

Best Regards,
Wearsky
If my post helps, then please consider Accept it as the solution to help others. Thanks.

 

 

 

Hi @Go_Ozeki,

 

In the 401 response, there should be header called www-authenticate, which should give you a clue as to what resource you need to specify when requesting access.

 

---
Please click Accept as Solution if my post answered your question. This will help others find solutions to similar questions. If you like my post and/or find it helpful, please consider giving it a Thumbs Up.

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Please click Accept as Solution if my post answered your question. This will help others find solutions to similar questions. If you like my post and/or find it helpful, please consider giving it a Thumbs Up.
Chris

Hi @v-xiaochen-msft,

 

I set the Header Prefix to "Bearer" and got the results fine!
All settings except Header Prefix were set as you said.

Go_Ozeki_0-1628070014333.png

 

I am very grateful for all the advice you have given me.

Thank you for help.

 

Hi @ChrisPiasecki,

 

I checked the www-authenticate and found the following statement, but I couldn't read that setting the Header Prefix to "Bearer" would solve the problem.

Bearer authorization_uri=https://login.microsoftonline.com/common/oauth2/authorize,resource_id=https://globaldisco.crm.dynamics.com/

 

But your advice was very helpful!

Thank you for help.

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