The server room is fairly easy in the sense that it is normally controlled access and rack-mounted equipment can have supplementary bonding to the racks so you have very reliable ADS by that means. So it is easy to justify no RCD protection for them.
However, you really should have a "utility" socket or two in the server room for any cleaners use, test equipment, etc, so no one plugs in a faulty device and either shock themselves or trip the supply to all of the racks, etc. That should be RCD protected, of course.
General office outlets are more of a problem in that you can't be so sure of the usage. Some companies have a strict no-PAT/no-usage policy on anything brought it, others not. For desk sockets for office PCs in that case the risk is very low. But often offices will have sink/kettle/etc around so at the very least that sort of outlet should be RCD protected.