Adding MailFrom addresses to ACS?

yfmike 40 Reputation points
2025-11-13T23:11:20.14+00:00

The "+ Add" button to add additional MailFrom addresses to the ACS email service (on a fully verified custom domain) is greyed out, and it is my general understanding that to get this enabled, a quota increase needs to be pursued. I have no need of a quota increase but, nonetheless, the description for submitting a request to support just takes me in a circle with no option for actually opening a support request to be able to submit the requested information for a quota increase (which apparently also enables custom MailFrom addresses).

What am I to do in order to actually submit a request with the information asked for to get the ACS quota out of defaults. which theoretically also enables the option to add MailFrom addresses other than DoNotReply? Has a process been designed here that forces the purchase of a support plan to get something done?

Azure Communication Services
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  1. TP 145.8K Reputation points Volunteer Moderator
    2025-11-13T23:21:31.5166667+00:00

    Hi,

    My instructions will allow you to request increase your default email sending limit, which when approved will enable the Add+ button.

    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 Others / Service and subscription limits (quotas) and click Next

    User's image

    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

    1 person found this answer helpful.

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