SimBrief is integrated into phpVMS v7.
Enter your SimBrief API key in admin, settings, simbrief section.
Yes, each pilot needs a SimBrief account and needs to be logged into it. They will be prompted on the phpVMS screen if they are not.
Basically, if a pilot clicks on the Generate OFP button, the info will be sent to SimBrief, the flight plan will be returned to phpVMS and displayed for the pilot to see.
I chose to only allow SimBrief if the pilot bids the flight.
Be sure you assign a subfleet to the flight and that the pilot holds a rank that allows them to use that subfleet.