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New Outlook vs classic Outlook on Windows

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New Outlook vs classic Outlook on Windows

New Outlook vs classic Outlook on Windows: what actually changes, what still doesn't work, and how to run the migration without a user revolt.

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/outlook-new-vs-classic-on-windows

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01

What the new Outlook is

The new Outlook is the OWA codebase running inside a desktop wrapper. It looks, feels, and updates like the web client — same UI conventions, and features ship to both at the same time. It connects to Exchange Online vi…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/outlook-new-vs-classic-on-windows

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02

What it doesn't do (still true in 2026)

The new Outlook has reached feature parity with classic for most mainstream use, but the remaining gaps are structural, not backlog items:

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/outlook-new-vs-classic-on-windows

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03

How Microsoft is rolling it out

The new Outlook is the default for new Microsoft 365 users, and Microsoft has been migrating existing users in waves — starting with smaller business SKUs, with enterprise SKUs on a slower, policy-controllable schedule.…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/outlook-new-vs-classic-on-windows

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04

What admins should do

For most users in 2026, the new Outlook is the right default, and fighting the direction is wasted effort — the useful work is sequencing your dependencies so the switch is boring. Just don't migrate everyone on the sam…

Solving Microsoft 365 · www.solvingmicrosoft365.com/guides/outlook-new-vs-classic-on-windows

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