Azure Communication Services rate limit

Question

Azure Communication Services rate limit

Benjamin 0

Hi,

I am interested in using Azure Communication Services for email distribution. I see in the documentation that there is a rate limit of 100 email messages per hour. Does this apply to the number of distributions (i.e., recipients in bulk) or per email message?

The documentation mentions that the quota can be increased by contacting support. How does it work? If we are approved, can we get an unlimited quota or is there some sort of upper limit?

Best regards

VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2024-03-11T04:02:34.07+00:00

Hello @Benjamin ,

I hope the answer helps. Please let me know if you have any further queries.

Please accept as Yes if the answer provided is useful, so that you can help others in the community looking for remediation for similar issues.

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VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2024-03-11T04:02:34.07+00:00

Hello @Benjamin ,

I hope the answer helps. Please let me know if you have any further queries.

Please accept as Yes if the answer provided is useful, so that you can help others in the community looking for remediation for similar issues.

Answer 1

VenkateshDodda-MSFT 25,111 Microsoft Employee Moderator

@Benjamin Thanks for reaching out to Microsoft Q&A, apologize for any inconvenience caused on this.

The limitation will be per request, so you can make 100 request/minute. If you are sending the email to 10 people (5 To, and 5 in the CC for example), then you can send 100 emails to 1000 people

Distribution list (DL) will be counted as 1 message.
Quota can be increased. Yes, it can be increased, you need to open a support ticket, and our internal team will review and approve the request based on different factors.
Can we have unlimited quota? No, there will always be an upper limit and as mentioned earlier increasing the limit will be dependent on different factors.

Hope this helps, let me know if you have any further questions on this.

Benjamin 0 Reputation points

2024-03-06T08:34:43.56+00:00

Hi @VenkateshDodda-MSFT , thanks for the answer!

So, is there an upper limit on the number of recipients per mail? Our recipient count may reach upwards of 1-2k per dispatch.

Regards,
VenkateshDodda-MSFT 25,111 Reputation points Microsoft Employee Moderator

2024-03-08T04:57:48.26+00:00

@Benjamin Thanks for your follow-up questions and apologize for the delay in my response.

As mentioned in the documentation, currently we can have maximum of 50 recipients in the send email and regarding your question related to upper limit to have around 1-2k recipients per dispatch Our internal reviewing or support team can help on this.

As suggested in the documentation I would suggest you raise a support ticket to assist you further questions on upper limits and to increase the quota of sending an email using ACS email service.
Stephajn Szekely 0 Reputation points

2024-05-22T22:01:23.24+00:00

Is there a way to find out what the current quota applied to a communication service instance is and how much of that quota is available?
CJS 0 Reputation points

2025-02-13T15:43:56.6666667+00:00

@VenkateshDodda-MSFT I'm trying to do this for a client company, but the Help + support section just directs me to the article thinking that's solved it. I need to create a support ticket for the email quota increase but it doesn't offer that option anywhere I can see? All routes to create a ticket seem to end up with the Help + support quiz that points to the article.

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Azure Communication Services rate limit

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