I've long posted on that -- the Free version is as far as I can see absolutely 100% compatible with EXCEL / Word / Powerpoint provided you don't need VBA macros. The paid version (only between 50 - 80 USD supports VBA macros which I'm tempted to try out). The Free version seems quite good even with complex formulae and charts.
There's a great Free LINUX version too. Also the Android version (Free) is fine for tablets / phones.
Note though there's no Email client so no OUTLOOK equivalent.
Download Office Free and Office Professional from Kingsoft Office Download Center
@Dude - Here's mine (still the Office 2016 trial)
BTW, are you using Home or ProPlus? Which shouldn't make a difference, but I'm on ProPlus.
Heading out to see what's what with this, because sumpin' ain't right!