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Add button disabled in Email Communication Service. How to enalbe it ?

Sai Rajesh Ramaraju 20 Reputation points
2026-04-06T07:02:15.45+00:00

Hello,
I am using ACS and setup a custom domain to add to the mail service.
The default email address provided for the domain is ******@mydomain.com

But I want to change the sender name to ******@mydomain.com. We are on the default tier. The only solution is to change the tier from free tier to something else by raising the ticket . I am a little confused on this part , as far as I remember azure doesn't have any type of tiers above the default tier. Then how can I fix this situtation ?

Azure Communication Services
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  1. TP 155.2K Reputation points Volunteer Moderator
    2026-04-06T07:14:13.24+00:00

    Hi,

    To enable +Add button (to add more MailFroms) for your custom domain you need to first increase your default email sending limit.

    There is a way to add additional MailFrom via Azure CLI (example) / PowerShell (example) without first increasing your send limit, however, I recommend you go ahead and increase your send limit regardless.

    Please carefully follow my instructions below to submit quota increase request and not get stuck in endless loop. The quota increase request is free.

    Please let me know if you have any issue creating case in a comment below and I will assist further.

    Please carefully follow instructions below to create a new Service and subscription limits (quotas) request to increase quota for Azure Communication Services.

    1. Navigate to this link to start the process:

    https://portal.azure.com/#create/Microsoft.Support

    2. Enter quota in the box and click Go

    User's image

    3. Select Service and Subscription Limits (Quotas) / Service and subscription limits (quotas) and click Next

    enter image description here

    4. Click Create a support request button, as shown

    User's image

    5. Select Issue type: Service and subscription limits (quotas), Subscription: <subscription that needs quota increase>, Quota type: Azure Communication Services Email: Sending Limits, click Next

    support request Problem description tab

    6. Open Notepad (or other text editor). Navigate to Email quota increase article, click Copy button in upper right to copy text, and Paste it into Notepad. Add your company info to the file and answer all questions, then save to a .txt file on your computer. You will need this file later.

    7. On Additional details tab, click Enter details, select location, resource group, ACS Email domain resource, New Email sending limit you would like to request, confirm request by entering the tier enum (200, 225, 250, 275, 300, etc.) click Save and continue.

    User's image

    enter image description here

    8. Still on Additional details tab, click the blue file folder icon, select the .txt file you created above, and click Open to upload it.

    enter image description here

    9. Finish filling out Additional details tab, click Next, review information and click Create. You should receive an automated email within a few minutes.

    Please click Accept Answer and upvote if the above was helpful.

    Thanks.

    -TP

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  1. Q&A Assist
    2026-04-06T07:02:27.8233333+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    The +Add button for additional sender (MailFrom) addresses on a custom domain is disabled while the domain is on the default email sending limit. To enable it, the sending quota must be increased via a support (quota) request. This is what is meant by “changing the tier” – it is not a different Azure pricing SKU, but a higher email sending limit tier for Azure Communication Services Email.

    Summary of what is required:

    1. Increase the email sending limit (quota) for the ACS Email domain
      • Submit a Service and subscription limits (quotas) support request for:
        • Quota type: Azure Communication Services Email: Sending Limits
      • In the request, specify the new sending limit tier (for example 200, 225, 250, etc.) as described in the quota increase guidance.
      • This quota increase is free; it just moves the domain from the default low-volume tier to a higher sending tier.
    2. After the quota increase is approved
      • Return to the Email Communication Service → Domains → MailFrom addresses.
      • The + Add button becomes enabled, allowing creation of additional sender usernames (for example ******@mydomain.com).
    3. Alternative via CLI/PowerShell
      • It is technically possible to add additional MailFrom addresses via Azure CLI or PowerShell without first increasing the send limit, but the documented and recommended path is to request the quota increase so the portal UI (and +Add button) works as expected.

    The “tier” mentioned in documentation and answers is therefore the email sending limit tier, not a separate Azure subscription or SKU. Raising this tier via a quota request will resolve the disabled +Add button and allow configuring the desired sender address on the custom domain.

    References:

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