Office 365 Offline Free -

★★★★☆ (4/5) Excellent for core productivity offline, but don't ignore the "phone home" requirement.

I rely on Microsoft 365 for work while commuting on a train with no signal for hours. Here's what actually works offline and what doesn't. office 365 offline

Here's a brief overview of the offline capabilities of popular Office 365 applications: office 365 offline