What Is Microsoft Outlook Used For: Features, Reviews & Alternatives
Email and calendaring client.
Editorially updated Oct 25, 2025
Microsoft Outlook
outlook.com
The overview
What Microsoft Outlook is for
1Core Capabilitie
- Web-based inbox, sent items, drafts, and custom folder navigation
- Day, week, month, and agenda views for scheduling and event management
- Web interface for managing personal and organization-wide contact list
- Integrated view for creating, tracking, and prioritizing to-do item
2Specialized Workflow
- Direct browser access and management of delegated or shared organizational mailboxe
- Interface for managing and responding to invitations on behalf of another user
- Web-based application of compliance and data retention policies to emails and folder
- Browser-based management and communication within Microsoft 365 Group
Who it helps
Useful ways to use Microsoft Outlook
A practical path
Sign In to Outlook on the Web
Navigate to outlook.office.com or outlook.live.com in your browser. Enter your Microsoft account credentials (email, phone, or Skype) and password. If prompted, complete multi-factor authentication to access your inbox
External signals
Reviews & reputation
Aggregated review score
A ubiquitous web client for Microsoft 365 communication, praised for its accessibility and core functionality, though some users note feature parity gaps compared to desktop versions and occasional interface complexities.
Quick answers
Frequently asked questions
1Can I access shared mailboxes or delegated calendars through the web interface?⌄
Yes, Outlook on the web fully supports accessing shared mailboxes and delegated calendars. You can add a shared mailbox by right-clicking "Folders" in the left pane and selecting "Add shared folder or mailbox," then entering the email address. For delegated calendars, they typically appear automatically if permissions are granted, or can be added via the calendar view.
2What are the primary differences between Outlook on the web and the desktop client?⌄
Outlook on the web provides core email, calendar, contacts, and tasks functionality with a focus on accessibility from any browser. The desktop client (e.g., Outlook for Microsoft 365) generally offers more advanced features like COM add-in support, deeper offline capabilities, extensive PST/OST file management, and more granular customization options not present in the web version.
3Is it possible to use Outlook on the web with non-Microsoft email accounts?⌄
While Outlook on the web is primarily designed for Microsoft Exchange Online and personal Microsoft accounts, you can add connected accounts from other providers like Gmail or Yahoo Mail. However, the full feature set and deep integration are best experienced with Microsoft-hosted mailboxes.
4How does data retention and compliance apply to emails accessed via the web client?⌄
Data retention policies, legal holds, and compliance features configured at the Exchange Online or Microsoft 365 tenant level apply universally, regardless of whether mail is accessed via the web client, desktop client, or mobile app. The web interface allows users to see and sometimes apply retention tags if enabled by their organization's administrators.
5What are the browser compatibility requirements for Outlook on the web?⌄
Outlook on the web is optimized for modern browsers including Microsoft Edge, Chrome, Firefox, and Safari. For the best experience, it's recommended to use the latest stable version of these browsers. Older or less common browsers may experience degraded functionality or display issues.
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