Re: Network Upgrade Solutions
Perhaps the first step is to actual determine if the dhcp pool (scope) is actually near/full - if the DHCP server is running on the fgt - go into DHCP monitor and check the total count there (at the bottom); if the DHCP pool scope doesn't appear full then you may have another issue on your hand (e.g. a rogue router or similar device connected to the network - check the dhcp monitor for any conflicting IPs or other warning.)
If the lease pool is near or is full - a temporarily measure is to simply shorten the lease time for the scope to say 2 days or less.
If you have wireless devices connecting to the network (either through a FortiAP or 3rd party ap) consider moving them off the 192.168.1.x subnet if they do not actually need to connect directly to it.
NSE4/FMG-VM64/FortiAnalyzer-VM/5.4/6.0 (FWF40C/FW92D/FGT200D/FGT101E)/ FAP220B/221C