==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release): EE 1.7.2
- Deployed with iRedMail Easy or the downloadable installer? Yes
- Linux/BSD distribution name and version: Ubuntu 24.04 LTS
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I'm having an interesting issue with a domain administrator.  They can create a domain, but afterwards attempting to add any users to that domain gets the error message:

Exceeded the limit for creating admin quotas

In admin privileges under their user account, I have the following settings:
10 Domains
100 Mail Users
100 Mail Aliases
10 Mailing Lists
100 GB Malbox Quota

As the global admin, I can create users on their domains without issue.

What am I missing?

Thanks!