This is ultimately a bit of a soapbox for me, but I'd like to stress here that accessing on-prem file shares is different from mapping drives. Mapping drives is in no way required for users to access a UNC path. There are many alternate and (arguably) better ways for users to access UNCs including common methods that users are already fully versed with and use much more frequently as they browse the web including shortcuts and favorites. Forced and micro-managed drive mappings are not the best way ultimately -- yes, this is somewhat subjective, but most folks have never tried anything else so they simply fall back on "this is the way we've always done it" instead of actually evaluating the possibilities. As noted, a bit of a soapbox, but the reality is that the work environment is changing and so much the paradigms that users use.