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caiku
New Member
June 29, 2026
Question

FortiAuthenticator - Minimum specification for 200 users

  • June 29, 2026
  • 2 replies
  • 42 views

Hi, I can see from KB that the minimum VM specs for FortiAuthenticator installation is CPU 8, Storage 1TB, Memory 16GB.

However, we only have 200 users. Can we reduce the specs to 500GB storage and 8GB memory? 

Anyone has done this? and is there any impact?

2 replies

sjoshi
Staff
sjoshi
Staff
June 29, 2026

Hi ​@caiku 

 

I would recommend to follow the guideline provided in the fortidocs

https://docs.fortinet.com/document/fortiauthenticator-private-cloud/8.0.0/vmware-esxi-administration-guide/370190/system-requirements

 

Reducing the resources below the threshold then what mentioned in the article can lead to resources utilization.

Thanks, Salon
    Markus_M
    Staff & Editor
    Markus_M
    Staff & Editor
    June 29, 2026

    Practice observation - You likely can, but you should monitor memory usage, 8GB should be fine still.
    Storage on disk very likely won't be a problem, even with less disk space. You can increase disk space later on, although the logs would be cleared. 

    See that article:
     

    Memory and CPU can be changed any time (with a shutdown of the FortiAuthenticator), so make a note of it, if issues are encountered. SNMP monitoring will be a good choice as well as taking setup best practices:
    https://community.fortinet.com/t5/FortiAuthenticator/Technical-Tip-Best-practices-on-hardening-FortiAuthenticator/ta-p/274443

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