I would like to change the (Sender) Display Name on my Azure Communications Services custom Domain

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@Ron Kitsmiller Thanks for reply and clarification!

As you pointed below from doc- How to add and remove multiple email sender addresses. - An Azure Communication Services quick start guide. | Microsoft Learn

Yes, the resource quota should be increased before this feature is enabled.

You can raise your default email sending limit. To request an increase in your email sending limit, follow the outlined steps-

1. Understand domain reputation

Email domain sender reputation is a measure of how trustworthy and legitimate recipients and email service providers perceive your emails.

2. Use a custom domain instead of an Azure Managed Domain

Azure Email Communication service lets you try out the email sending feature using a domain that Azure manages. For your production workloads and higher sending limits, you should use your own domain to send emails.

You can set up your own domain by creating a custom domain resource under an Azure Email Communication Service resource. Azure Managed Domains are intended for testing purposes only. There are limits imposed on the number and frequency of emails you can send using the Azure Managed Domain. If you want to raise your email sending limit, you must configure a custom domain using Azure Email Communication Service.

For more information, see Service limits for Azure Communication Services.

3. Configure a mail exchange record for your custom domain

Although Azure Communication Service only supports outbound emails, we recommend setting up an MX record to improve the reputation of your sender domain.

4. Build your sender reputation

Once you complete the previous steps, you can start building your sender reputation by sending legitimate production workload emails. To improve your chances of receiving a rate limit increase, try to minimize email failures and spam rate before requesting for a limit increase.

5. Request an email quota increase-

There is sample of letter provided- https://video2.skills-academy.com/en-us/azure/communication-services/concepts/email/email-quota-increase#5-request-an-email-quota-increase

Then submit the information in an incident report at Create a support ticket, requesting to raise your email sending limit.

Note that- Email quota increase requests aren't automatically approved. The reviewing team considers your overall sender reputation when determining approval status. Sender reputation includes factors such as your email delivery failure rates, your domain reputation, and reports of spam and abuse.

For more information about the quota increase process, you can refer to this document

Quota increase for Azure Email Communication Service - An Azure Communication Services concept document | Microsoft Learn

Hope this helps, Let us know if further query, happy to assist.