SRX 320 Client VPN - number of clients limitation?

Hi all,

I was trying hard to clarify if the 2 concurrent client VPN-s is still a limitation in 

Model: srx320
Junos: 15.1X49-D45

I remembered I had to buy and install licenses for a customer who needed more than 2 concurrent Client VPN users on SRX240.

Please advise,

Thanks in advance!

Alex