We have a client whom we installed 3CX Pro and configured as contact center. A problem arise where operators need to blacklist numbers of rude insistent callers and for that reason I was forced to create admin account for them just so they have that option. As you can imagine that exposes the system to big security risk up to the point where some of them can change system configuration - intentionally or not - up to not functional. And that is 24/7 contact center so such behaviour is highly unacceptable. Any ideas how can I solve that issue are welcome.