I noticed this person had a similar issue and was able to resolve it with a regedit key to disable a specific shortcut - Disable control+enter when typing a message in Lync.
Does anyone happen to know the key names/values for disabling Control+Shift+S? Or know how I can figure out the values for various other keyboard shortcuts in Skype for Business in case something else crops up?
Currently, every time I try to Save As in Illustrator using the keyboard shortcut(Control+Shift+S), it ends the meeting, and I have to bug someone on the other end to turn the meeting back on, which is frustrating for everyone involved.