How to position right Fortigate model for 3000 network users?

Hi @DSL ,

This is a complex question and depends in many factors (your topology, environment, the scope of the use, etc).

You can check the FortiGate model's datasheet to see the values for each version and decide for yourself.

https://www.fortinet.com/content/dam/fortinet/assets/data-sheets/Fortinet_Product_Matrix.pdf

https://www.fortinet.com/de/resources/datasheets

Another way is you need to contact your Sales Engineer. They can take in your request  Systems Engineer (SE) that covers your territory.
http://www.fortinet.com/aboutus/locations.html

Alternatively, it can be done through Regional Sales Partner Channel
http://www.fortinet.com/partners/reseller_locator/locator.html

Also, you can get in touch with our Professional Service Team, they will help you with the whole process.

https://www.fortinet.com/support/support-services/professional-services

Best Regards,

Vasil