We are encountering a somewhat strange anomaly, from many computers, sometimes it happens that after clicking on the link to access a meeting / call, the browser loads the address but then stops after a few seconds. This happens randomly. On PCs where we are carrying out tests, sometimes the same link works on a PC but after 1 hour, with another link it does not work and crashes.
We have a fortigate 900D,
we have the rules set up to manage teams and skype traffic using the presets already included.