A family of Microsoft word processing software products for creating web, email, and print documents.
So glad I found this thread, I'm experiencing the same issue after a fresh install of Windows 10 Pro and Office 365. Tiny cursor syndrome appears in Word and Outlook (the applications I use the most) and only when hovering over hyperlinks or italicised text. Doesn't happen in Chrome or other applications.
Strangely enough, before this fresh install, the tiny cursor syndrome didn't appear on the exact same hardware.
Sorry you had to join us... But welcome, nonetheless.
What resolution, scaling, video card, mouse, etc., etc., etc. are you using? I'm still trying to see the patterns as to when this issue appears and when it doesn't...