HI @taiwo popoola
Thanks for reaching us regarding To increase your quota for creating a CDN and for Azure Communication Services (email), the process is almost identical for both—only Step 5 differs:
- For Email (ACS): Select Quota type: Azure Communication Services Email – Sending Limits.
- For CDN: Select Quota type: CDN.
Then provide the details requested for each service.
Please carefully follow my instructions below to submit quota increase request and CDN request separately and not get stuck in endless loop. They work with all support plans (including Developer). 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 and for CDN.
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

3. Select Others / Service and subscription limits (quotas) and click Next

4. Click Create a support request button, as shown

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


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 and for CDN Fill Basics, then in Additional details enter the fields above and attach the .txt evidence file. 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.

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.

9. Finish filling out Additional details tab, click Next, review information and click Create. You should receive an automated email within a few minutes
Reference : https://learn.microsoft.com/en-us/azure/azure-resource-manager/management/azure-subscription-service-limits
https://learn.microsoft.com/en-us/azure/communication-services/concepts/email/email-quota-increase#5-request-an-email-quota-increase
Kindly let us know if the above comment helps or you need further assistance on this issue.