Hi and welcome to CoffeeSnobs.
There is one - and only one - machine I would recommend and that is a Jura.
I hope your office has a large budget for the machine as they are expensive..... but the lesser superautomatics will cost you far more in the long run..... lots of regular maintenance required, much lower reliability (often spending more time in for repairs than making coffee - and the repairs are also very expensive as is the routine maintenance).
In an office environment the routine maintenance on these superautos often isnt done as required..... and this can cause more problems than a manual machine (they also require someone to take charge of the machine and service it as required).....
A Jura will produce good coffees.... the others.... well if you like your coffee - I wouldnt bother on that count either.