Microsoft to Replace Outlook for Mac With New Universal Client - MacRumors
Skip to Content

Microsoft to Replace Outlook for Mac With New Universal Client

Microsoft is planning to replace Outlook for Mac with a new web-based universal Outlook client, according to Windows Central.

microsoft outlook web app

Months after announcing a complete redesign of Outlook for Mac, Microsoft is reportedly intending to scrap its current Mac app and replace it with a new client based on the Outlook web app.

Codenamed "Monarch," the project is Microsoft's attempt to build a single Outlook client across Windows, Mac, and the web. The new client will also replace the default Mail and Calendar apps on Windows 10 and unify Microsoft's entire selection of Outlook apps.

Project Monarch is said to be based on the pre-existing Outlook web app, offering the best indication of how the replacement app will look and function when it is released. While there will apparently be some native OS integrations for the likes of offline storage and notifications, the overall goal is to remain as universal as possible across platforms.

The change allows Microsoft to use the same codebase for apps on all devices, helping it to streamline development. For users, the new single client would be smaller in size and offer the same user experience across all devices.

Microsoft will reportedly begin to preview its new Outlook client toward the end of 2021, and plans to replace the Mail and Calendar apps in Windows 10 in 2022. Outlook for Mac will presumably be deprecated at some point during this timeframe.

Popular Stories

surface laptop ultra

Microsoft Launches $2,599 Surface Laptop Ultra to Take on MacBook Pro

Wednesday October 7, 2026 5:45 pm PDT by
Microsoft today announced launch timing and pricing for the Surface Laptop Ultra that it unveiled earlier this year. The 15-inch Surface Laptop Ultra is priced starting at $2,599, undercutting Apple's $2,999 16-inch MacBook Pro, and it targets the same creator and developer market. Microsoft says it is built for "demanding creative, software development, AI, engineering, and 3D workloads." ...
M5 MacBook Pro

RIP, MacBook Ultra

Monday October 19, 2026 9:37 am PDT by
Apple today sent out invites for an experience in Los Angeles on Wednesday, October 28, and the "Pro and tell" tagline on the invitation likely means that the rumored MacBook models with touch-enabled OLED displays will stick with MacBook Pro branding instead of the once-rumored "MacBook Ultra" name. The long-rumored "iPhone Ultra" ended up being named iPhone Duo, so speculation that Apple...
iPhone Duo Trio

Here's What Apple's Apps Look Like on the iPhone Duo

Tuesday October 20, 2026 11:12 am PDT by
With just three days to go until the iPhone Duo is released, Apple is getting ready for the launch. Behind the scenes, the App Store now has screenshots of Apple's built-in apps running on the Duo. We've seen some apps in marketing materials, but images of the ones we haven't seen give us an idea of what it will be like using the iPhone Duo day to day. Many apps are shown in landscape...

Top Rated Comments

MakeAppleAwesomeAgain Avatar
76 months ago
It would be nice if they'd make up their mind for once and not completely change Outlook every 2-3 years.
Score: 57 Votes (Like | Disagree)
SteveAbootman Avatar
76 months ago
If I wanted the web experience for Outlook, I'd open my web browser.
Score: 50 Votes (Like | Disagree)
ruka.snow Avatar
76 months ago
This sounds like a terrible move that'll take away a rather performant app and replace it with some electron garbage. The only plus side being that could open itself to an easy Linux client.
Score: 49 Votes (Like | Disagree)
76 months ago
Unacceptable. I don’t want a web app. I want a responsive locally hosted secure application. Stop ruining apps.
Score: 44 Votes (Like | Disagree)
adepew Avatar
76 months ago
Why is it so hard to make Outlook on Mac function like Outlook on Windows? No one wants this watered down web experience.
Score: 38 Votes (Like | Disagree)
76 months ago
So I am expecting subscription prices to go down after the launch of this.
Score: 18 Votes (Like | Disagree)
Latest Stories
iPhone Duo Reviewers Really Miss Face ID
iPhone Duo Reviewers Really Miss Face ID
5 hours ago
Does the iPhone Duo Run Hot? Here's What Reviews Found
Does the iPhone Duo Run Hot? Here's What Reviews Found
6 hours ago
Apple Music's New Look is Now Live on Apple's Website
Apple Music's New Look is Now Live on Apple's Website
7 hours ago
Anthropic Launches Claude Duet, a Proactive AI Agent
Anthropic Launches Claude Duet, a Proactive AI Agent
7 hours ago
What 32,000 Folds Did to the iPhone Duo's Hinge
What 32,000 Folds Did to the iPhone Duo's Hinge
8 hours ago
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
iPhone Duo's Hidden FaceTime Camera Takes 'Trash' Photos
10 hours ago
iPhone Duo Has 'Edge Light' Feature That Debuted on Macs Last Year
iPhone Duo Has 'Edge Light' Feature That Debuted on Macs Last Year
10 hours ago
Apple Support App Updated for iPhone Duo's Larger Display
Apple Support App Updated for iPhone Duo's Larger Display
10 hours ago
Amazon Sweetens the Deal on Entry-Level 16-Inch MacBook Pro With $570 Off
Amazon Sweetens the Deal on Entry-Level 16-Inch MacBook Pro With $570 Off
11 hours ago
iPhone Duo Tips Over on MagSafe Stands When Unfolded
iPhone Duo Tips Over on MagSafe Stands When Unfolded
11 hours ago
Apple Music's New Look Officially Announced
Apple Music's New Look Officially Announced
12 hours ago
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
iPhone Duo Supports Apple Pencil Starting With iOS 27.2
13 hours ago
iPhone Duo Accessories Roundup: Cases and Screen Protectors From OtterBox, ZAGG, and More
iPhone Duo Accessories Roundup: Cases and Screen Protectors From OtterBox, ZAGG, and More
14 hours ago
Apple Stores Will Have 'Limited' Availability of iPhone Duo for Walk-In Customers
Apple Stores Will Have 'Limited' Availability of iPhone Duo for Walk-In Customers
14 hours ago
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
iPhone Duo Reviews Explain Why Device is Both 'Fun' and 'Frustrating'
14 hours ago
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
Apple Says 'Reachability' Feature Coming to iPhone Duo Later This Year
15 hours ago
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
Loop Capital Cuts Apple Rating Over iPhone Sales Outlook
20 hours ago
Apple Stores in Bordeaux and Lille Looted During French Protests
Apple Stores in Bordeaux and Lille Looted During French Protests
20 hours ago
Bluesound Adds Native Apple Music Support
Bluesound Adds Native Apple Music Support
20 hours ago
Apple CEO John Ternus Explains What Makes Good Product Design
Apple CEO John Ternus Explains What Makes Good Product Design
21 hours ago
UK Proposes New Ways to Help Apple Pay Rivals
UK Proposes New Ways to Help Apple Pay Rivals
23 hours ago
WhatsApp Developing In-App Browser for All Chat Links on iPhone
WhatsApp Developing In-App Browser for All Chat Links on iPhone
1 day ago
Apple's App Store Chief Explains Its Push for Premium Games
Apple's App Store Chief Explains Its Push for Premium Games
1 day ago
Apple Could Owe Even More After $5.7 Billion Patent Verdict
Apple Could Owe Even More After $5.7 Billion Patent Verdict
1 day ago
Skyrim Comes to Apple Silicon Macs With New Unofficial Installer
Skyrim Comes to Apple Silicon Macs With New Unofficial Installer
1 day ago
Apple Highlights Mac and iPad Use in Paris Design Exhibition
Apple Highlights Mac and iPad Use in Paris Design Exhibition
1 day ago
Apple Seeks 6G Modem Engineers as It Plans for Post-5G iPhones
Apple Seeks 6G Modem Engineers as It Plans for Post-5G iPhones
1 day ago
First iPhone Duo Unboxing Video Appears Ahead of Friday Launch
First iPhone Duo Unboxing Video Appears Ahead of Friday Launch
1 day ago
Perplexity Computer Can Now Run Fully Locally on Mac
Perplexity Computer Can Now Run Fully Locally on Mac
1 day ago
Apple's Touchscreen OLED MacBook Pro: Everything We Know
Apple's Touchscreen OLED MacBook Pro: Everything We Know
1 day ago