SSL VPN User Limit

Search for a document called the 'Maximum Values Matrix'. It will have all models and limitations.

I found a thread from 2013:

https://forum.fortinet.com/tm.aspx?m=94732

Although the max value doesn't tell for SSL VPN, at least I know the member limit of a user group is 300. However, if you create a different groups and combine them into the same SSL VPN policy you can exceed the number. In the past, I did that with 1500D up to about 600 users in.

But these are just for static config. Not concurrent users, which I can't find so far like the old thread.