(this is key for spreadsheets, etc)
If you’re working within a Virtual Desktop on a MAC with the PCoIP client you’ll notice the “control” key on the keyboard doesn’t work (map) like a windows keyboard. Normally on a MAC keyboard you’d use the “command” key but that doesn’t work inside a MAC PCoIP virtual desktop as of now.
The fix; press the “fn” key + “control” key simultaneously along with click the cells on the spreadsheet or whatever you’re trying to select that’s not sequentially together.