FAC/FSSO Ip address conflict

Hi,

I use the FortiClient Single Sign-On Mobility Agent and I am facing an issue: FAC registers all user IP addresses.
Let’s consider two users: one connected remotely through VPN and one connected from the corporate LAN. The home network IP address of the remote user overlaps with the IP address of the user in the corporate LAN. As a result, one of the users is removed from FortiGate/FAC with the following error:
Internally logoff and removing FortiClient item 11024-HR.xxx.xxx:192.168.12.26 [xxx.xxx/j**bleep**h] (all IPs conflicting).
I believe that during the initial FAC/EMS configuration I chose the option to register all IP addresses, but now I cannot find this setting. I am not sure whether I am simply overlooking it or whether it disappeared after an update.
How should this be handled?

Regards,

Lukasz