I have tested it with a couple of emails, mine and the other is of a colleague. Both of us got the email within 10 mins. It doesn't appear to be a problem with the azure side. Both scheduled and send now work for us. The sender of the email is "microsoft-noreply@microsoft.com"
To further debug this issue, you can check on the following 2 points
- Verify email addresses: Double-check that the email addresses for the affected users are correct and that they are added to the subscription with the appropriate role.
- Verify billing permissions: Verify that the affected users have the necessary billing permissions to receive cost analysis emails. They need to be assigned the Reader role for the billing account and the Reader or Contributor role for the subscription.
Also, they can verify that there are no inbox rules that delete those emails or move them to a side folder.
Hope this helps! Let me know the progress.
If this does answer your question, please accept answer and give a thumbs up as a token of appreciation.