Meraki MX64 Advanced Security License and Support, 1 Year

An Organization can only be of one edition type, Pro, Enterprise or Advanced Security. What this means is that if an MX series Security Appliance is added with an Advanced Security license any additional MX devices added to the Organization can not be added with an Enterprise license.

Q: Can I upgrade from Enterprise to Advanced Security (MX Only)?
A: Yes you can, and it’s easy. If you have a 10 MX60 Enterprise network, simply purchase a 10 MX60 Advanced Security license and apply it to your account. Your account will be automatically upgraded and you will receive credit (in the form of extra time) for any unused portion of your enterprise license.