Communication Service: Denied by the resource provider.

Question

Communication Service: Denied by the resource provider.

Letian Xu 31

Hi, I need some help on sending email through Communication Services by an Http post request, using Postman. I am following this article (expect I am using email not sms): https://learn.microsoft.com/en-us/azure/communication-services/tutorials/postman-tutorial However, all I get is a 401 Unauthorized error: "Denied by the resource provider" I have tried sample code provided in GitHub and I can confirm my communication services is working ok with js library "@azure/communcation-email". Can any one provide any suggestion on this? Thanks heaps.

Grmacjon-MSFT 19,301 Reputation points Moderator

2023-05-04T23:06:37.3366667+00:00

Hi @Letian Xu ,

checking in to see if your issue was resolved. If the information below helped address your question, please Accept the answer. This will help us and also improve searchability for others in the community who might be researching similar information. Thanks!

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Grmacjon-MSFT 19,301 Reputation points Moderator

2023-05-04T23:06:37.3366667+00:00

Hi @Letian Xu ,

checking in to see if your issue was resolved. If the information below helped address your question, please Accept the answer. This will help us and also improve searchability for others in the community who might be researching similar information. Thanks!

Answer 1

Grmacjon-MSFT 19,301 Moderator

Hi @Letian Xu ],

thanks for bringing this to our attention. this sounds like an authentication/ authorization issue based on the error message you shared. to troubleshoot this issue you can:

Make sure that you have correctly configured your Communication Services resource and obtained the required credentials, such as the Azure Communication Services connection string or access token. Make sure you are using the correct credentials in your Postman request.https://learn.microsoft.com/en-us/azure/communication-services/concepts/authentication
Double-check that you are using the correct endpoint and request URL in your Postman request. The endpoint should be in the format https://<your-resource-name>.communication.azure.com/, and the request URL should be in the format /<api-version>/communications/send.
Ensure that your Postman request includes the correct headers, including the Authorization header with your access token, the Content-Type header set to application/json, and the x-ms-content-type header set to multipart/mixed.

Hope that helps.

Best, Grace

Frank 5 Reputation points

2023-06-27T15:08:34.5466667+00:00

Hi,

I also received this error. I was given a different endpoint: **https://<your-resource-name>.communication.azure.com/**emails:send?api-version=2023-03-31 but if I change to the one you have above, it gives me an error that states Our services are down please try later (not exact quote). I can see the bearer token in the variables (I am using postman) so that is working. Everything else is set according to the tutorial you referenced. Is there something else I am missing?
Leelong Tan 0 Reputation points

2023-10-11T16:53:57.5433333+00:00
Please note the endpoint should be in the suggested format without the trailing "/" as mentioned in the postman tutorial sample [Ensure you remove the trailing slash]. It's easily missed.

https://<your-resource-name>.communication.azure.com

Answer 2

Letian Xu 31

Hi @Grmacjon-MSFT ,

Sorry for the late reply.

My issue was resolved but according to the information you provided.

The problem is in the tutorial:

https://learn.microsoft.com/en-us/azure/communication-services/tutorials/postman-tutorial

Host is added as part of HMAC-SHA256 signed header but signature doesn't include the encrypted host.

By adding encrypted host into signature fixed my issue.

Frank 5 Reputation points

2023-06-27T15:08:59.28+00:00

Where do you get the encrypted host?
Rafael Villa Verde 0 Reputation points

2023-08-19T03:36:32.41+00:00

I'm having the same problem (401 Denied by...) using the tutorial instructions, and I couldn't understand well when you explained about the solution. Could you be more succinct about "add the Encrypted Host"?
Arthur Cesare-Herriau 10 Reputation points

2023-09-22T12:01:42.8833333+00:00

I have the exact same issue after following the tutorial https://learn.microsoft.com/en-us/azure/communication-services/tutorials/postman-tutorial

I do not understand the include the encrypted host part.
Arthur Cesare-Herriau 10 Reputation points

2023-09-22T14:10:03.08+00:00

Problem solved. I had to remove the / in my endpoint string:

Change this:
endpoint=https://<resource>.<region>.communication.azure.com/
To this:

endpoint=https://<resource>.<region>.communication.azure.com

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Communication Service: Denied by the resource provider.

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