Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
1 answer
Cognitive Services connection fails with "Server not responding" in Azure Communication Services
I'm trying to connect a Cognitive Services resource to my Azure Communication Services (ACS) resource, but the connection keeps failing. Steps to reproduce: Navigate to my ACS resource in the Azure Portal Go to Cognitive Services (under the…
Azure Communication Services
asked 2026-08-04T14:50:23.18+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(166.4, 73%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHW%3C/text%3E%3C/svg%3E)
Hammad Wali
0
Reputation points
commented 2026-08-22T20:15:40.95+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(182.40000000000003, 55.00000000000001%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAD%3C/text%3E%3C/svg%3E)
Abhinaba Das
105
Reputation points Microsoft External Staff
Moderator
1 answer
Alphanumeric Sender ID the SMS fails to send
I have been Approved for a Alphanumeric Sender ID which is HomeHeatHub but when using this Alphanumeric Sender ID the SMS fails to send. I'm using the Connector Azure Communication Services SMS in SharePoint list Power Automate. I read something about…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-05T20:07:58.1466667+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(252.8, 42%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESS%3C/text%3E%3C/svg%3E)
stewart sayers
0
Reputation points
edited a comment 2026-08-22T20:11:03.5133333+00:00
Abhinaba Das
105
Reputation points Microsoft External Staff
Moderator
0 answers
ACS Email: custom-domain mail silently dropped by iCloud; Azure-managed domain delivers to the same recipient
Email sent via Azure Communication Services to Apple-hosted recipients (@icloud.com) is accepted and then silently discarded — never delivered, never bounced — when the From domain is one of our verified custom domains. The identical message to the same…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-03T02:04:01.1366667+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(227.2, 62%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJR%3C/text%3E%3C/svg%3E)
Jeff Reed
0
Reputation points
commented 2026-08-22T19:08:33.2066667+00:00
Abhinaba Das
105
Reputation points Microsoft External Staff
Moderator
3 answers
One of the answers was accepted by the question author.
Toll-Free Phone Number Regulatory Verification
Hello, I wanted to see what the normal turnaround time is to get verification for a toll-free number that will be used to send SMS notifications from my Blazor application. I have all of the privacy policy and opt-in/out information setup. I submitted my…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-16T22:46:30.6766667+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(182.40000000000003, 26%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJF%3C/text%3E%3C/svg%3E)
James Franco
20
Reputation points
accepted 2026-08-21T00:21:21.5166667+00:00
James Franco
20
Reputation points
5 answers
One of the answers was accepted by the question author.
Azure Communication Services Email: Quota Increase Request — Current Limits Insufficient for Non-Profit Communication Needs
Problem description I am seeking assistance with increasing the sending quotas for my Azure Communication Services Email resource. Currently, the quotas are 30 messages per minute and 100 messages per hour, which are insufficient for my organization's…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-20T18:51:25.14+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(201.6, 41%, 29%)' 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)
Jaymin Kavaiya
45
Reputation points
answered 2026-08-21T00:15:54.99+00:00
Andrew Taylor - COREZENN
1,305
Reputation points
Volunteer Moderator
0 answers
Azure Communication Services 10DLC registration says paid Azure Plan subscription is ineligible
We are implementing US 10DLC messaging for a nonprofit customer using Azure Communication Services. The ACS resource has United States as its data location. Its subscription is active and billed under Microsoft Azure Plan/Pay-As-You-Go, with the spending…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-20T19:19:44.76+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(278.4, 28.999999999999996%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EZM%3C/text%3E%3C/svg%3E)
Zeal Mayfield
0
Reputation points
asked 2026-08-20T19:19:44.76+00:00
Zeal Mayfield
0
Reputation points
1 answer
One of the answers was accepted by the question author.
Is it possible to send and receive MMS using Azure Communication Services?
Hello, I know SMS is possible using ACS, but what about sending/receiving images and videos? Is this possible? If so, where are the docs? If not, is this on the roadmap? Thank you
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
![](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(297.6, 44%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ES%3C/text%3E%3C/svg%3E)
1 answer
Email view events issue for communication service
Hi, I am using Azure Communication Services Email to send emails, and I need user engagement tracking to determine whether recipients have opened or clicked the emails. I have already requested and received an increase to the email sending quota. User…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-19T09:07:34.4066667+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(182.40000000000003, 90%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDP%3C/text%3E%3C/svg%3E)
Deep Patel
0
Reputation points
commented 2026-08-19T13:41:50.6333333+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(272, 70%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
Abinesh Magudeeswaran
90
Reputation points Student Ambassador
2 answers
EmailEngagementTrackingReportReceived event not being triggered
I recently implemented a solution that uses Azure Communication Service and works pretty well. The only problem is the EmailEngagementTrackingReportReceived that seems not to being triggered at all. The "User engagement tracking" is turned on…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2023-09-06T09:34:00.0033333+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, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Anonymous
commented 2026-08-19T09:31:35.3333333+00:00
Deep Patel
0
Reputation points
0 answers
Can Azure Communication Services (ACS) Email attachment limits be increased, and how can I verify the actual limit configured for my ACS resource?
Hi Microsoft Community, I'm looking for guidance regarding Azure Communication Services (ACS) Email attachment size limits. We have an ACS Email resource using a custom domain, and several months ago a Microsoft support request was reportedly raised to…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-19T03:38:07.6233333+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(284.8, 53%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJN%3C/text%3E%3C/svg%3E)
Julian Nones
0
Reputation points
commented 2026-08-19T05:14:43.4033333+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(60.8, 5%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAR%3C/text%3E%3C/svg%3E)
Ajay Rathod
350
Reputation points Microsoft External Staff
Moderator
3 answers
One of the answers was accepted by the question author.
I have been waiting for over 30 days for my toll free verification with ACS
Does anyone know if this is normal and why there is no update on my verification? Also, any recommendations on a different service to use for SMS while I want for toll free verification?
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
![](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(156.8, 26%, 25%)' 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)
1 answer
ACS 10DLC Brand & Campaign registration — "subscription not eligible" on eligible Pay-As-You-Go subscription
On an Azure Communication Services resource, creating a 10DLC Brand/Campaign regulatory document (Telephony and SMS > Regulatory Documents > Add > United States > Local > Brand) returns: "Your subscription is not eligible for Brand…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-05T18:06:35.7166667+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(240, 16%, 33%)' 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)
James B
0
Reputation points
commented 2026-08-18T21:06:47.7433333+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
12,585
Reputation points Microsoft External Staff
Moderator
3 answers
One of the answers was accepted by the question author.
Azure Communication Service - Regulatory Document Approval for SMS
Hello, We've recently purchased a tollfree number for development purposes on Communication Services and submitted the regulatory document for SMS. Just recently, we've received a response: July 28, 2026 Entity misclassification (legal entity type…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
![](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(0, 76%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMC%3C/text%3E%3C/svg%3E)
2 answers
One of the answers was accepted by the question author.
How do I request an increase to Azure Communication Services Email sending limits for a verified custom domain?
We are using Azure Communication Services Email to send transactional email from a verified custom domain, and we are hitting the default sending rate limits. Current behaviour: During a single controlled test run, the service accepted a batch of…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-14T08:29:33.31+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(227.2, 66%, 32%)' 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)
Mihir Srivastava
20
Reputation points Microsoft Employee
accepted 2026-08-17T18:44:34.9833333+00:00
Mihir Srivastava
20
Reputation points Microsoft Employee
1 answer
One of the answers was accepted by the question author.
Add additional MailFrom Addresses in Azure email communication service
We have an Azure Communication Services Email custom verified domain. The domain is verified, but the MailFrom Addresses blade only contains donoreply @mydomain.com and the Add option is unavailable. We need to authorize custom email as a sender…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-17T15:00:31.87+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(105.60000000000001, 34%, 20%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAP%3C/text%3E%3C/svg%3E)
Amol Patil
20
Reputation points
commented 2026-08-17T16:18:43.8333333+00:00
Amol Patil
20
Reputation points
1 answer
ACS Call Automation Play and Recognize return 401/8565 with managed identity and Azure AI network ACL
We are testing Azure Communication Services Call Automation in a protected, synthetic, no-PHI environment using the Node.js Call Automation SDK. Production calling is disabled. The inbound call path now reaches ACS successfully: answerCall succeeds. …
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
![](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(0, 59%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMT%3C/text%3E%3C/svg%3E)
![](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, 53%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EN%3C/text%3E%3C/svg%3E)
2 answers
Azure Communication Services - Outbound calls Caller ID is different from the registered CNAM.
We registered CNAM for our Azure Communication Services (ACS) phone numbers. CNAM lookup tools and some destinations (e.g. Zoom Phone/Workplace) show the correct registered company name, but many consumer mobile phones only show the phone number, not the…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-06T23:43:47.09+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(291.2, 42%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
AI MSI
20
Reputation points
commented 2026-08-16T13:56:25.5666667+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
7,440
Reputation points Microsoft External Staff
Moderator
1 answer
Azure Communication Services Email: Reverse DNS (PTR) mismatch on outbound infra causing deliverability failures to strict mail servers
We are experiencing consistent email delivery failures from our Azure Communication Services Email custom domain to specific corporate mail servers (e.g. Arsys-hosted mailboxes), while delivery to major providers (Gmail) succeeds without issue. Resource…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-15T08:15:31.52+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(304, 52%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJ%3C/text%3E%3C/svg%3E)
Joan
0
Reputation points
answered 2026-08-15T15:02:11.8766667+00:00
Vinodh247-1375
43,911
Reputation points
Volunteer Moderator
0 answers
ACS Email: one accepted send operation delivered twice (same Message-ID, two MIME builds, two egress regions)
We use Azure Communication Services Email with a verified custom domain. Our application submitted one send request and the recipient received two copies of the message. Our side is certain there was exactly one request: a single POST, one operation id…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-14T07:42:14.41+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(25.6, 65%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMN%3C/text%3E%3C/svg%3E)
Mariusz Nosol
0
Reputation points
edited the question 2026-08-14T07:48:04.9+00:00
Mariusz Nosol
0
Reputation points
1 answer
Azure Communication Services GCC Moderate Authorization
According to documentation, "Azure Communication Services in Azure Government has achieved FedRAMP High accreditation as part of the Microsoft 365 Government Community Cloud (GCC) - High service offering. The service is now Generally Available (GA)…
Azure Communication Services
Azure Communication Services
An Azure communication platform for deploying applications across devices and platforms.
1,762 questions
asked 2026-08-12T02:30:44.04+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(297.6, 11%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJS%3C/text%3E%3C/svg%3E)
Jordan Stubblefield
0
Reputation points Microsoft Employee
commented 2026-08-13T17:42:07.16+00:00
Ajay Rathod
350
Reputation points Microsoft External Staff
Moderator