Classic vs. New Outlook: A Comparison

Microsoft Outlook has been a cornerstone of personal and professional communication for decades. With the latest update of Office 2021, users have the option to experience both the classic Outlook and the new, revamped Outlook for Windows. This blog post dives deep into comparing the features, usability, and improvements between these two versions, helping you make an informed decision about which version suits your needs best.

Evolution of Outlook: Classic vs. New

Classic Outlook: A Reliable Companion

The classic Outlook has long been a trusted tool for managing emails, calendars, and contacts. Its robust features, such as multiple mail profiles, offline support, and extensive customizability, have made it a favourite among users who need a dependable email client.

New Outlook: Modern and Simplified

The new Outlook for Windows brings a fresh, modern design coupled with innovative features and Microsoft Copilot-assisted capabilities. Aimed at enhancing productivity, the new Outlook offers a simplified interface, intelligent email management, and seamless integration with other Microsoft 365 services.

Feature Comparison

Let’s delve into the key features that differentiate classic Outlook from the new Outlook, providing you with a clear understanding of what each version offers.

Account Support

FeatureClassic OutlookNew Outlook
Work or school account (Office 365 / Entra ID)AvailableAvailable
Microsoft accounts (,
Exchange (on-prem and on-prem ADFS)AvailableUnder investigation
Multiple mail profilesAvailableUpcoming
Shared mailbox / shared foldersAvailableUpcoming
Shared mailbox – ArchiveAvailableUpcoming
Shared mailbox – Delegate accessAvailablePartially available

Calendar Features

FeatureClassic OutlookNew Outlook
3-day calendar viewAvailableAvailable
Add attendees as optionalAvailableAvailable
Category colorsAvailableAvailable
Delegate accessAvailableUpcoming
Edit this and all following events in a seriesNot supportedAvailable
In-person eventsNot supportedAvailable
Group calendarsAvailableAvailable
Meeting insightsPartially availableAvailable
Meetings to be always online (Zoom, Webex, etc.)AvailableAvailable
My Day / To-do barAvailableAvailable
Offline supportAvailableUpcoming
Quick creation of eventsAvailableAvailable
Preserve declined meetingsNot supportedAvailable
Save meeting as a draftAvailableAvailable
Sensitivity labels with Microsoft Information Protection on eventsAvailableAvailable
Schedule ViewAvailableInvestigating
Shortened meetings (Outlook preferences and service settings)AvailableAvailable
Show as working elsewhereAvailableAvailable

Mail Features

FeatureClassic OutlookNew Outlook
Block senderAvailableAvailable
Continuous access evaluationAvailableAvailable
Data Loss Prevention (DLP)AvailablePartially Available
Mandatory labelingAvailableAvailable
Report phishing or junkAvailableAvailable
Spam reporting, phishing, and smart alert improvements (1.14 API set)UpcomingUpcoming
Sensitivity labelsAvailableAvailable


FeatureClassic OutlookNew Outlook
COM add-insAvailableNot supported
Content formsAvailableNot supported
Every meeting online for 3rd-party providersAvailableAvailable
Web add-insAvailableAvailable
Spam reporting, phishing, and smart alert improvements (1.14 API set)UpcomingUpcoming
Web add-ins support in primary Entra (work or school) accountsAvailableAvailable
Web add-ins support in primary Microsoft accounts (personal accounts)AvailableAvailable
Web add-ins support in secondary accountsAvailableUnder investigation
Web add-ins support in 3rd-party accounts (such as Gmail, Yahoo, iCloud, etc.)Not supportedNot supported

Experience the New Outlook: Key Features and Enhancements

Seamless Transition and Customization

Switching to the new Outlook is straightforward. If your account is supported, you’ll see a toggle in the upper right corner of your current Outlook. This enables you to download and start using the new app, with an option to import your settings from the classic Outlook. Customization options are plentiful, allowing you to tailor the experience to your preferences.

Enhanced Productivity Tools

Pinning Emails

The new Outlook allows you to pin important emails to the top of your inbox. This feature ensures that crucial messages remain easily accessible, eliminating the need to search for them repeatedly.

Email Snooze

Sometimes, emails arrive at inconvenient times. With the snooze feature, you can schedule a time for the email to reappear in your inbox, ensuring you handle it at the right moment.

Scheduled Send

In today’s global work environment, timing is everything. The new Outlook lets you schedule emails to be sent at a specific time, avoiding disruptions during off-hours for your recipients.

Improved Calendar and Contacts Management

In-Person and Online Meetings

The new Outlook supports both in-person and online meeting scheduling, integrating seamlessly with tools like Zoom and Webex. This flexibility caters to hybrid work environments, where meetings may need to switch between virtual and physical formats.

Delegate Access and Group Calendars

While full delegate access is still upcoming, the new Outlook already supports group calendars, making it easier to manage team schedules and collaboration.

Microsoft Copilot Integration

One of the standout features of the new Outlook is the integration of Microsoft Copilot. This AI-powered assistant helps automate routine tasks, provides intelligent email suggestions, and enhances overall productivity.

Feedback and Future Updates

Microsoft is actively seeking user feedback to continuously improve the new Outlook. Users are encouraged to use the in-app “Help > Give Feedback” link to share their thoughts and suggestions. This collaborative approach ensures that the new Outlook evolves based on real user experiences and needs.


Both the classic and new Outlook for Windows offer robust features tailored to different user preferences and requirements. The classic Outlook remains a reliable and comprehensive tool, while the new Outlook introduces modern enhancements aimed at improving productivity and user experience.

We invite you to try out the new Outlook and share your thoughts. How do you find the new features? Does the modern design enhance your workflow? Let us know what you think!

Feel free to switch between the classic and new Outlook to find the perfect fit for your email and calendar management needs. The future of email communication is here, and it’s exciting to see how it evolves with user feedback and technological advancements.

What do you think of the game shown? Share your experiences and feedback with us.

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