@Dawnintheageofaquariams
@Lifeisnotalwaysfair
In a total power failure I would expect the IT department to say that their servers shutdown in a clean manner via a UPS, or their highly critical servers/systems switched cleanly to the expensive backup generation
I would have expected a risk assessment to have been conducted, (covering the likelihood of an incident plus the severity of impact - with a seperate risk matrix per risk/system) mitigations assessed and proposed to management with prioritisation against cost.
In classic desktop networks I would have put in UPS interruptable power supplies that had enough battery backup to initiate and complete a server shutdown.
Unless highly critical I would not worry about the network switches, desktops, printers but if critical to life / existence of the business I would prioritise each and have additional UPS to keep those going - which would effectively need a generator to kick in
(I would consider active user files against the operating systems ability to preserve versions across the network/cloud and/or be able to recover the latest copy that was in use as computers crashed)
In the laptop age the laptops battery would be expected to just continue, (for its battery life), therefore it would be more affordable to have a mitigation that kept the network running
An alternative mitigation is to let the network connection drop but have the contingency for users to tether their mobile phones, which would last as long as the battery life. Perhaps top that up with a cupboard of power banks and cables
In the age of cloud computing the IT department could use cloud servers, in which eases their need to physically manage and protect a local server but at the cost of a cloud managed system.
With your business network on the cloud then a local power outtage could be easily mitigated by laptop batteries and phone tethering, followed by leaving the site to elsewhere / home where there may be power, WiFi etc
I would not care about printers, but if printing remains critical I used to have a mobile battery powered full colour inkjet. I have not seen any of those around for years, with the nearest thing being heat transfer sticker printers and some A4 heat transfer printers
The IT departments answer would be to follow the action plan and their proposed mitigations