Grounding of IT equipment for office ESD protection
Basics of an Electrostatic Protected Area (EPA):


Ground all conductors (including people)
Remove all insulators


I appreciate that in an office environment, you may be somewhat limited, so here are some other things to consider:


Polystyrene cups could be replaced with cardboard
Document wallets could be replaced with ESD document wallets
Grounded document organisers can be placed on desks. Paper can be a source of static electricity
If you have access, increase the humidity of the HVAC system.
Air Ionizers can be fitted to neutralise charge on insulators
ESD flooring and ESD chairs could be installed, if the budget exists