Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
1 answer
Getting Phone number in Singapore for ACS
We are setting up a custom app and will embed Azure Communication Services for calling. When trying to get a phone number (supposed to be Trial), we are having this message "Your azure tenant is currently using 0 out of 1 available phone numbers…
Azure Communication Services
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 82%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPA%3C/text%3E%3C/svg%3E)
2 answers
ACS refuses initiation of brand/campaign registration due to ineligible Azure subscription
I want to begin the Brand and Campaign registration process to use a local number (10DLC) for A2P SMS messaging. But I am encountering this message when I begin the process (under my ACS service resource/Telephony and SMS/Regulatory Documents/Create a…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-13T09:54:43.4633333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(160, 37%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJB%3C/text%3E%3C/svg%3E)
JT Bennett
0
Reputation points
answered 2026-05-20T23:13:46.1466667+00:00
JT Bennett
0
Reputation points
1 answer
Unable to create SMTP usernames on Azure Communication Service — adding returns 409 "The username is not available" despite the resource not existing.
I had an existing Azure Communication Service instance with two domains configured, each with several SMTP usernames. I deleted the resource group containing the ACS instance and all its resources, and then created a brand new ACS instance in a new…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-04-14T10:37:10.83+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(246.4, 77%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EIS%3C/text%3E%3C/svg%3E)
Ivan Svoboda
0
Reputation points
commented 2026-05-20T22:07:36.1366667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(80, 7.000000000000001%, 17%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPM%3C/text%3E%3C/svg%3E)
Praneeth Maddali
9,595
Reputation points Microsoft External Staff
Moderator
3 answers
Custom domain verification for Email Communication Service is failing
ACS Email Communication Service XXXXx, custom domain XXXXXXXXXXX.org, domain and SPF/DKIM verification failing despite all records being correctly published at the authoritative nameservers. The Provision Domain screen keeps reporting that the…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-20T17:50:13.89+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(214.4, 88%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDS%3C/text%3E%3C/svg%3E)
Diana Schuetz
0
Reputation points
commented 2026-05-20T18:55:13.72+00:00
TP
156.6K
Reputation points
Volunteer Moderator
1 answer
SMS Registration campaign filing
When trying to register for SMS campaign, the site keeps failing after I submit. The message I'm getting is, Server not responding. Unable to access regulatory documents right now. Please try again later.
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-20T16:40:17.9566667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(32, 41%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERC%3C/text%3E%3C/svg%3E)
Ryan Collins
0
Reputation points
edited an answer 2026-05-20T17:45:15.2633333+00:00
Ryan Collins
0
Reputation points
1 answer
Troubleshoot and configure custom domains and SPF records for Azure Communication Services email
While configuring custom domains and SPF records for Azure Communication Services email, it is not able to verify custom domain status (bought from Azure), SPF, DKIM and DKIM2. I am entering correct values, still Azure not able to verify my domain.
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2025-09-14T09:58:31.04+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(249.60000000000002, 57.99999999999999%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EB%3C/text%3E%3C/svg%3E)
BSPL
20
Reputation points
commented 2026-05-20T17:43:09.6633333+00:00
Praneeth Maddali
9,595
Reputation points Microsoft External Staff
Moderator
3 answers
Azure Communication Service stops sending email
We are evaluating Azure Communication Services for sending emails. Domain and other verifications are already complete. However when testing, we find that after sending a number of emails, trying to connect and send additional emails stops working.…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-20T14:46:37.3+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(236.8, 36%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJK%3C/text%3E%3C/svg%3E)
Jake K
56
Reputation points
edited an answer 2026-05-20T15:10:00.76+00:00
Praneeth Maddali
9,595
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
Call Automation ACS cant add a PSTN participant using AddParticipantAsync
var callConnection = answerCallResult.CallConnection; var phoneNumber = new PhoneNumberIdentifier("+11234567890"); var invite = new CallInvite(phoneNumber); await callConnection.AddParticipantAsync(invite); The above code gives the…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-18T13:09:41.64+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(38.4, 21%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EFZ%3C/text%3E%3C/svg%3E)
Faisal Zaidi
20
Reputation points
commented 2026-05-20T11:42:27.02+00:00
Alex Burlachenko
20,905
Reputation points MVP
Volunteer Moderator
0 answers
Request preview access to ACS Email inbound (EmailInboundReceived event)
We're building a transactional email workflow on our ACS resource XXXXXX-communication-service (region: United States). We're using ACS Email for outbound (verified domains: XXXXXXXXXXXX) and would like to enable the preview "Email Inbound…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-18T22:09:20.76+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(243.2, 56.00000000000001%, 33%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESR%3C/text%3E%3C/svg%3E)
Sandun Ranaweera
0
Reputation points
commented 2026-05-20T09:16:23.2733333+00:00
Alex Burlachenko
20,905
Reputation points MVP
Volunteer Moderator
3 answers
DNS verification for email service
Hi - I am trying to set up email communication service in the azure portal and connect it to my domain - the first 2 steps, domain and spf status are both shown as verified. However the dkim and dkim 2 are not - I have entered all the correct records…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2025-11-20T10:29:38.2466667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(115.19999999999999, 55.00000000000001%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EL%3C/text%3E%3C/svg%3E)
LeoM
10
Reputation points
commented 2026-05-20T06:19:54.8633333+00:00
Sven Obermaier
15
Reputation points
0 answers
Azure Communication Services: Subscription not eligible for 10DLC Brand and Campaign registration
Hi there — I'm hitting a backend eligibility wall when attempting 10DLC brand and campaign registration in an Azure Communication Services resource. Hoping someone can route this internally or advise on the right unblock path. Problem In the Azure…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-15T23:45:39.9966667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 80%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESG%3C/text%3E%3C/svg%3E)
Solomon Ganz
0
Reputation points
commented 2026-05-19T14:45:03.9133333+00:00
Praneeth Maddali
9,595
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
Azure Comms Calling, outbound calls failing with error code 504...
Hi there, We have an application that employs ACS telephony which our client uses to make calls to customers. Lately, client users are reporting cases of a 504 error while trying to make outbound calls. We are logging errors in detail and here is an…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-15T10:13:44.2633333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(35.2, 86%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDO%3C/text%3E%3C/svg%3E)
Dylan Olney
140
Reputation points
accepted 2026-05-19T12:37:33.3566667+00:00
Dylan Olney
140
Reputation points
1 answer
URGENT: NASEEB Alphanumeric Sender ID for SMS testing in UK blocked - HTTP 429 quota error despite valid billing
Hi, I have already received an pre-approved Alphanumeric Sender ID from the https://pstnsd.powerappsportals.com/ portal. I cannot complete the required NASEEB sender ID testing due to quota restrictions. CRITICAL ISSUE: HTTP 429 "Request limit…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-18T10:24:45.5066667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(3.2, 54%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESE%3C/text%3E%3C/svg%3E)
Salah Elbeera
0
Reputation points
answered 2026-05-19T11:07:26.2133333+00:00
Alex Burlachenko
20,905
Reputation points MVP
Volunteer Moderator
2 answers
One of the answers was accepted by the question author.
Azure Comms - many outbound calls failing with code 400 - BadRequest
Hi, I've developed an application for a client that uses the Azure Comms calling service. It had been working well until recently, when outbound calls started failing all of a sudden with either an error code of 400 or 603. Today, a total of 25 outbound…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-04-29T14:46:49.2833333+00:00
Dylan Olney
140
Reputation points
accepted 2026-05-19T10:27:40.69+00:00
Dylan Olney
140
Reputation points
1 answer
Toll-free SMS not delivering to end users despite ACS 202 acceptance
Issue: Using Azure Communication Services with a toll-free number for SMS delivery. Every send returns HTTP 202 (accepted) from ACS but messages are not delivered to end users on Verizon or Straight Talk networks. Setup: Toll-free number purchased…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-15T22:45:11.71+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 71%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EEP%3C/text%3E%3C/svg%3E)
ERIC PROSHUTO
0
Reputation points
commented 2026-05-19T08:51:39.31+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(99.2, 85%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGV%3C/text%3E%3C/svg%3E)
Golla Venkata Pavani
5,235
Reputation points Microsoft External Staff
Moderator
1 answer
ACS SDK WinUI3 App crashes randomly in MSVCP140.dll after video call teardown
Our app makes repeated outgoing video calls (1-to-1, Teams interop). After several calls in a session, the app crashes randomly during hangup process at some nth call with a fatal access violation inside MSVCP140.dll Exception: 0xc0000005 It seems like…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-15T12:02:53.4633333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 28.000000000000004%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EC%3C/text%3E%3C/svg%3E)
Charupak
1
Reputation point
commented 2026-05-18T09:30:11.7766667+00:00
Golla Venkata Pavani
5,235
Reputation points Microsoft External Staff
Moderator
1 answer
One of the answers was accepted by the question author.
Communication Service sms 5000 message failed to deliver
Hello, I'm having problems with the communication services, I'm not able anymore to deliver sms messages, and I used this service as to send a 2fa code, I don't have volume, I problably send less than 50 messages a day. The error I can see from Event…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-14T03:05:44.9366667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(99.2, 92%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMS%3C/text%3E%3C/svg%3E)
Matteo Salvalaggio
20
Reputation points
accepted 2026-05-14T23:24:18.8866667+00:00
Matteo Salvalaggio
20
Reputation points
0 answers
Cannot purchase Toll-Free phone number
I am unable to purchase a toll-free number. i see the option but when i attempt to add to cart i get an "unexpected error while purchasing phone numbers" notification. What are the steps to get this done?
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-13T19:49:23.4133333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(121.6, 21%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAF%3C/text%3E%3C/svg%3E)
Asher Fhima
0
Reputation points
commented 2026-05-14T21:54:31.5633333+00:00
Praneeth Maddali
9,595
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
Azure Communication Services Email: Partial delivery to @microsoft.com from custom domain
I’ve set up Azure Communication Services (Email) and configured a custom domain (e.g., abc.microsoft.com). However, when using this resource, I’m unable to send emails from an address like ******@xyz.microsoft.com to recipients such as…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-14T03:36:54.63+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(192, 41%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESC%3C/text%3E%3C/svg%3E)
Sandeep Chinnari
20
Reputation points Microsoft Employee
accepted 2026-05-14T21:37:11.61+00:00
Sandeep Chinnari
20
Reputation points Microsoft Employee
2 answers
email communication quota increase
Customer Information Company name: Good News New York Church Company website: gnmusa.org Provide a brief description of your business: A church in Huntington, NY Email Service Information Is your custom domain already set up and currently used for…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,665 questions
asked 2026-05-11T19:11:18.1+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(313.6, 83%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESW%3C/text%3E%3C/svg%3E)
Sung Woo Yang
0
Reputation points
commented 2026-05-13T05:20:32.6833333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(153.6, 51%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAN%3C/text%3E%3C/svg%3E)
Aditya N
2,960
Reputation points Microsoft External Staff
Moderator