As you can see, HP doesn't claim it to be an NAS where as PCMag and PCWorld rate it in their top 5 of NAS. It doesn't really fit into the NAS realm though, more like a home entertainment server. It mainly talks about file sharing and streaming and iTunes and stuff. Personally, anything with the word "home" in it, I wouldn't use at the office. I think you would be much better off with a good computer for your server or even getting an actual server and server OS.
Jon makes it very clear on his site that AC 4.0 isn't compatible with an NAS. I am not sure how many people run server applications on an NAS whether it be Buffalo or HP. But, I agree with Wendell I would check. Then, again, put a version on and run it. But, inherently, even though a lot of the lower end "NASs" have a lot of media things attached, I tend to think of NAS as being a lot of storage which has RAID and is networked so all computers can share files with it. Some, can do FTP such as Buffalo.
http://h71036.www7.hp.com/hho/cache/580818-0-0-225-121.html?jumpid=reg_R1002_USENhttp://www.pcworld.com/article/125072/top_10_networkattached_storage_devices.html
