The last non-bloat version of Microsoft Office is 2010.
Good luck finding one to download. And if you find one it will probably be a retail version.
Only Volume versions can be activated with KMS
KMS_VL_ALL-49 works on both Windows and Office but it will not convert a retail version of Office to volume.
FrostRose was a older activator seemed to convert the Office install from retail to volume. At least this is how it appears to me.
So if you try to activate with KMS_VL_ALL-49 and it reports failure because Office is retail, run FrostRose first. FrostRose portable is fine and causes Defender less freaking out. You may not even want KMS_VL_ALL-49 for Office and just use FrostRose. But if FrostRose gets zapped, KMS will now replace easily.
Why bother? KMS_VL_ALL-49 is simpler and has only a single dll to exclude. Not sure it will last longer but FrostRose would lose activation from time to time.
As always it's a moving target.
Now I see KMS_VL_ALL-50 floating around but I haven't found it anywhere I trust.
I don't think you can even buy a key for Office 2010 anywhere.
Or try this