so if employees all use work's free wifi how does work tie in and dig out who a specific phone belongs to. assume no work apps/functions being done on the work phone. all personal stuff.
It would depend on how they have their firewall configured and where that device accesses. Some websites still don't use HTTPS. They could know spatially where the device is located by which access point it connects to, etc. There is lots of crumbs left.so if employees all use work's free wifi how does work tie in and dig out who a specific phone belongs to. assume no work apps/functions being done on the work phone. all personal stuff.
As an IT guy at an employer, we can at the very minimum get the Device name. So if we see an employee has googled something inappropriate on a mobile device, we can check against the IP to find out that it was googled from, say 'Sam's iPhone 7' or whatever. We could also if needed request a log of every site that device has visited on our wifi network.
Again it depends on the details of what you are calling email.