Technical Tip: Cannot add more than 8 SSIDs per AP profile

FortiGate 5.X, 6.X and 7.X

At a given point of time only 8 SSIDs can be added per radio per AP profile.

A 9th SSID is greyed out and cannot be chosen as shown in the screenshots.

A second radio with another 8 SSIDs can be added to the same AP profile if needed.

Ideally if users add 8 SSIDs in one antenna, then the same SSID should be added to the other antenna as well.

All the SSIDs should be added to both 2.4ghz and 5ghz antenna as part of best practice.

2.4ghz offers less speed, 5.0ghz offers more speed. Hence it is recommended to add the SSIDs to both the antennas.

Note:

When background scanning is enabled, an AP radio supports a maximum of seven SSIDs. Features like Radio Resource Management (DARRP), Auto-TX Power, and background scanning take up a slot, thereby limiting the total number of SSIDs to 7. Refer to the FortiAP datasheet for more information: FortiAP Datasheet 

Related link:

Wireless network configuration | FortiWiFi and FortiAP Configuration Guide.

Troubleshooting Tip: Error while adding 8 SSIDs per client serving radios in FortiAP profile; Error: at most 7 vaps can be configured

Technical Tip: Cannot Add 8 SSIDS to the FortiAP profile