# Outlook on the web

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Microsoft's personal information manager web app

This article is about the web business software. For other platforms, see [Microsoft Outlook](/source/Microsoft_Outlook) and [Outlook.com](/source/Outlook.com).

Outlook on the web Microsoft Outlook logo Outlook Mail inbox in Outlook on the web, running in Microsoft Edge Developer Microsoft Release May 23, 1997[1] Written in TypeScript (React) Type Personal information manager (Webmail, calendaring, contacts, and tasks) License Web version: Not licensed On-premises: Trialware Website microsoft.com/microsoft-365/outlook/web-email-login-for-outlook

**Outlook on the web** (formerly **Outlook Web App** and **Outlook Web Access**[2]) is a [personal information manager](/source/Personal_information_manager) [web app](/source/Web_app) from [Microsoft](/source/Microsoft). It is a web-based version of [Microsoft Outlook](/source/Microsoft_Outlook), and is included in [Exchange Server](/source/Microsoft_Exchange_Server) and [Exchange Online](/source/Exchange_Online) (a component of [Microsoft 365](/source/Microsoft_365)).[3][4][5]

It can be freely accessed from any web browser whether inside or outside an organization's network,[6][5] and includes a [web email client](/source/Webmail), a [calendar tool](/source/Calendaring_software), a [contact manager](/source/Address_book), and a [task manager](/source/Task_management). It also includes add-in integration, Skype on the web, and alerts as well as unified themes that span across all the web apps.[7]

## Purpose

Outlook on the web is available to Microsoft 365 (formerly Office 365) and Exchange Online subscribers, and is included with the on-premises Exchange Server, to enable users to connect to their email accounts via a [web browser](/source/Web_browser), without requiring the installation of [Microsoft Outlook](/source/Microsoft_Outlook) or other [email clients](/source/Email_client). In case of Exchange Server, it is hosted on a local [intranet](/source/Intranet) and requires a network connection to the Exchange Server for users to work with e-mail, address book, calendars and task.[8] The Exchange Online version, which can be bought either independently or through Office 365 licensing program, is hosted on Microsoft servers on the [World Wide Web](/source/World_Wide_Web).[8]

## History

Outlook Web Access was created in 1995 by Microsoft Program Manager Thom McCann on the Exchange Server team. An early working version was demonstrated by Microsoft Vice President Paul Maritz at Microsoft's famous Internet summit in Seattle on December 27, 1995. The first customer version was shipped as part of the Exchange Server 5.0 release in early 1997.

The first component to allow client-side scripts to issue [HTTP requests](/source/HTTP_request) ([XMLHTTP](/source/XMLHttpRequest)) was originally written by the Outlook Web Access team.[9][10] It soon became a part of [Internet Explorer 5](/source/Internet_Explorer_5). Renamed XMLHttpRequest and standardized by the [World Wide Web Consortium](/source/World_Wide_Web_Consortium),[11] it has since become one of the cornerstones of the [Ajax](/source/Ajax_(programming)) technology used to build advanced web apps.

Outlook Web Access was later renamed Outlook Web App in 2010.[12] An update on August 4, 2015, renamed OWA to "Outlook on the web",[13] often referred to in brief as simply "Outlook".

## Components

Mail function on Outlook Web App (2013)

### Mail

Mail is the webmail component of Outlook on the web. The default view is a three column view with folders and groups on the left, an email message list in the middle, and the selected message on the right. With the 2015 update, Microsoft introduced the ability to pin, sweep and archive messages, and undo the last action, as well as richer image editing features.[13] It can connect to other services such as [GitHub](/source/GitHub) and [Twitter](/source/Twitter) through Office 365 Connectors. Actionable Messages in emails allows a user to complete a task from within the email, such as retweeting a Tweet on Twitter or setting a meeting date on a calendar.[14]

Outlook on the web supports [S/MIME](/source/S%2FMIME) and includes features for managing calendars, contacts, tasks, documents (used with [SharePoint](/source/SharePoint) or [Office Web Apps](/source/Office_Web_Apps)), and other mailbox content. In the Exchange 2007 release, Outlook on the web (still called Outlook Web App at the time) also offers read-only access to documents stored in SharePoint sites and network [UNC](/source/Uniform_Naming_Convention) shares.[15]

### Calendar

Calendar is the calendaring component of Outlook on the web. With the update, Microsoft added a weather forecast directly in the Calendar, as well as icons (or "charms") as visual cues for an event. In addition, email reminders came to all events, and a special Birthday and Holiday event calendars are created automatically. Calendars can be shared and there are multiple views such as day, week, month, and today. Another view is work week which includes Mondays through Fridays in the calendar view. Calendar's "Board View" feature allows for a customizable calendar with widgets such as Goal, Calendar, Tasks and Tips.

Calendar details can be added with HTML and rich-text editing, and files can be attached to calendar events and appointments.

### People

People is the contact manager component of Outlook on the web. A user can search and edit existing contacts, as well as create new ones. Contacts can be placed into folders and duplicate contacts can be linked from multiple sources such as LinkedIn or Twitter.[16] In Outlook Mail, a contact can be created by clicking on an email address sender, which pulls down a contact card with an add button to add to Outlook People. Contacts can be imported as well as placed into a list that can be utilized when composing an email in Outlook Mail.

People can also sync with friends and connections lists on LinkedIn, Facebook, and Twitter.

### To Do

Main article: [Microsoft To Do](/source/Microsoft_To_Do)

To Do was originally launched as *Tasks for Outlook Web App*. Microsoft was slowly rolling out a preview of Tasks to its consumer-based [Outlook.com](/source/Outlook.com) service that in May 2015, was announced to be moving to the Office 365 infrastructure.[17] It was initially a part of Calendar as a view. Microsoft has separated the services into its own web app in Outlook on the web. In a post on the Office Blogs in 2015, Microsoft announced that Outlook Web App would be renamed Outlook on the web and that Tasks would move under that brand.[13] A user can create tasks, put them into categories, and move them to another folder. A feature added was the ability to set due days and sort and filter the tasks according to those criteria. The app provides the user with fields such as subject, start and end dates, percent complete, priority, and how much work was put into each task. Rich editing features like bold, italic, underline, numbering, and bullet points were also introduced. Tasks can be edited and categorized according to how the user wishes them to be sorted.[18]

## Removed features

Outlook on the web has had two interfaces available: one with a complete feature set (known as Premium) and one with reduced functionality (known as Light or sometimes Lite). Prior to Exchange 2010, the Premium client required [Internet Explorer](/source/Internet_Explorer). Exchange 2000 and 2003 require [Internet Explorer 5](/source/Internet_Explorer_5) and later,[19][20] and Exchange 2007 requires [Internet Explorer 6](/source/Internet_Explorer_6) and later.[21] Exchange 2010 supports a wider range of web browsers: [Internet Explorer 7](/source/Internet_Explorer_7) or later, [Firefox](/source/Firefox) 3.01 or later, [Chrome](/source/Google_Chrome), or [Safari](/source/Safari_(web_browser)) 3.1 or later.[22] However, Exchange 2010 restricts its Firefox and Safari support to [macOS](/source/MacOS) and [Linux](/source/Linux).[22] In Exchange 2013, these browser restrictions were lifted.[23]

In Exchange 2010 and earlier, the Light [user interface](/source/User_interface) is rendered for browsers other than Internet Explorer. The basic interface did not support search on Exchange Server 2003. In Exchange Server 2007, the Light interface supported searching mail items; managing contacts and the calendar was also improved.[21][24] The 2010 version can connect to an external email account.

The ability to add new accounts to Outlook on the web using the Connected accounts feature was removed in September 2018 and all connected accounts stopped synchronizing email the following month.[25]

## See also

- [List of collaborative software](/source/List_of_collaborative_software)

## References

1. **[^](#cite_ref-1)** ["Happy Birthday OWA: Outlook Web Access Turns 10!"](https://exchangepedia.com/2007/05/happy-birthday-owa-outlook-web-access-turns-10.html). May 23, 2007.

1. **[^](#cite_ref-2)** AshaIyengar21 (February 22, 2023). ["Outlook on the web in Exchange Online"](https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-on-the-web/outlook-on-the-web). *learn.microsoft.com*. Retrieved October 4, 2023.{{[cite web](https://en.wikipedia.org/wiki/Template:Cite_web)}}: CS1 maint: numeric names: authors list ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_numeric_names:_authors_list))

1. **[^](#cite_ref-3)** ["Getting started in Outlook Web App"](https://support.microsoft.com/en-us/office/getting-started-in-outlook-web-app-0062c7be-f8e3-486e-8b14-5c1f793ceefd). Microsoft. Retrieved September 2, 2020.

1. **[^](#cite_ref-4)** ["Compare Exchange Online plans"](https://products.office.com/en-us/exchange/compare-microsoft-exchange-online-plans). *office.com*. [Microsoft](/source/Microsoft). Retrieved November 19, 2015.

1. ^ [***a***](#cite_ref-:2_5-0) [***b***](#cite_ref-:2_5-1) ["Examining the Cost of Outlook Web Access"](https://www.brighthub.com/computing/windows-platform/articles/115885/). *www.brighthub.com*. April 28, 2011. Retrieved October 18, 2023.

1. **[^](#cite_ref-6)** ["Outlook 2013 Web Access"](https://www.dummies.com/article/technology/software/microsoft-products/general-microsoft/outlook-2013-web-access-168803/). *dummies*. Retrieved October 18, 2023.

1. **[^](#cite_ref-7)** ["What's new in Exchange 2016"](https://technet.microsoft.com/en-us/library/jj150540%28v=exchg.160%29.aspx). *TechNet*. Microsoft. Retrieved November 28, 2015.

1. ^ [***a***](#cite_ref-:0_8-0) [***b***](#cite_ref-:0_8-1) ["Sign in to Outlook Web App"](https://support.office.com/en-US/article/Sign-in-to-Outlook-Web-App-e08eb8ac-ac27-49f4-a400-a47311e1ee7e). *Office.com*. [Microsoft](/source/Microsoft).

1. **[^](#cite_ref-9)** Le Roy, Bertrand; Matt Gibbs (2006). ["Some history: from XmlHttp to UpdatePanel"](https://books.google.com/books?id=CVgttN8YGOcC&pg=PA2). *ASP.NET AJAX Update Panel Control*. O'Reilly Short Cuts. p. 2. [ISBN](/source/ISBN_(identifier)) [978-0-596-52747-1](https://en.wikipedia.org/wiki/Special:BookSources/978-0-596-52747-1).

1. **[^](#cite_ref-10)** Hopmann, Alex. ["The story of XMLHTTP"](https://web.archive.org/web/20070623125327/http://www.alexhopmann.com/xmlhttp.htm). Archived from [the original](http://www.alexhopmann.com/xmlhttp.htm) on June 23, 2007. Retrieved January 6, 2014.

1. **[^](#cite_ref-11)** ["The XMLHttpRequest Object"](http://www.w3.org/TR/XMLHttpRequest/). W3C. April 15, 2008. Retrieved October 1, 2008.

1. **[^](#cite_ref-12)** msdmaguire. ["Outlook Web App: Exchange 2013 Help"](https://learn.microsoft.com/en-us/exchange/outlook-web-app-exchange-2013-help). *learn.microsoft.com*. Retrieved October 7, 2025.

1. ^ [***a***](#cite_ref-Ootw_13-0) [***b***](#cite_ref-Ootw_13-1) [***c***](#cite_ref-Ootw_13-2) ["New features coming to Outlook on the web"](https://web.archive.org/web/20160220031553/https://blogs.office.com/2015/08/04/new-features-coming-to-outlook-on-the-web/). *Office Blogs*. [Microsoft](/source/Microsoft). August 4, 2015. Archived from [the original](https://blogs.office.com/2015/08/04/new-features-coming-to-outlook-on-the-web/) on February 20, 2016.

1. **[^](#cite_ref-14)** team, the Outlook (September 27, 2016). ["New Outlook partner integrations help you extend your email capabilities"](https://www.microsoft.com/en-us/microsoft-365/blog/2016/09/27/new-outlook-partner-integrations-help-you-extend-your-email-capabilities/). *Microsoft 365 Blog*.

1. **[^](#cite_ref-15)** ["Tips on Remote File Access in Exchange 2007"](https://techcommunity.microsoft.com/t5/exchange-team-blog/tips-on-remote-file-access-in-exchange-2007/ba-p/601122). *TECHCOMMUNITY.MICROSOFT.COM*. May 1, 2009. Retrieved December 1, 2020.

1. **[^](#cite_ref-:1_16-0)** ["Using contacts (People) in Outlook on the web – Office Support"](https://support.office.com/en-sg/article/Using-contacts-People-in-Outlook-on-the-web-1e3438c7-26b2-420c-87de-3cea9d31b5cb?ui=en-US&rs=en-SG&ad=SG). *support.office.com*. Retrieved November 25, 2015.

1. **[^](#cite_ref-17)** ["From the Forums: Outlook on the web preview, first impressions"](https://www.neowin.net/news/from-the-forums-outlook-on-the-web-preview-first-impressions). Retrieved August 20, 2015.

1. **[^](#cite_ref-18)** ["Tasks overview"](https://support.office.com/en-za/article/Tasks-overview-89f8064f-2516-4036-845c-a6953e166fe0). *support.office.com*. Retrieved August 20, 2015.

1. **[^](#cite_ref-19)** ["Exchange 2000 Outlook Web Access"](https://technet.microsoft.com/en-us/library/cc750258.aspx). Microsoft Corporation. 2002. Retrieved November 22, 2009.

1. **[^](#cite_ref-20)** ["Improvements in Outlook Web Access 2003"](https://technet.microsoft.com/en-us/library/aa996808(EXCHG.65).aspx). Microsoft Corporation. 2006. Retrieved November 22, 2009.

1. ^ [***a***](#cite_ref-aa997437_21-0) [***b***](#cite_ref-aa997437_21-1) ["Client Features in Outlook Web Access"](https://technet.microsoft.com/en-us/library/aa997437.aspx). Microsoft Corporation. 2008. Retrieved November 22, 2009.

1. ^ [***a***](#cite_ref-Browsers_22-0) [***b***](#cite_ref-Browsers_22-1) ["Outlook Web App Supported Browsers"](http://help.outlook.com/en-us/140/bb899685%28EXCHSRVCS.140%29.aspx). Microsoft Corporation. Retrieved April 21, 2010.

1. **[^](#cite_ref-microsoft1_23-0)** [Supported browsers for Outlook Web App – support](http://office.microsoft.com/en-us/support/supported-browsers-for-outlook-web-app-HA102824601.aspx). Office.microsoft.com. Retrieved on April 12, 2014.

1. **[^](#cite_ref-24)** ["Microsoft Office Outlook Web Access"](http://www.microsoft.com/exchange/code/OWA/index.html). Microsoft Corporation. 2007. Retrieved May 27, 2009.

1. **[^](#cite_ref-25)** ["Connect email accounts in Outlook on the web (Office 365)"](https://support.office.com/en-gb/article/Connect-email-accounts-in-Outlook-on-the-web-Office-365-d7012ff0-924f-4f78-8aca-c3912d886c4d). Microsoft. 2018. Retrieved March 12, 2019.

## External links

- [Official website](https://microsoft.com/microsoft-365/outlook/web-email-login-for-outlook)

- [Official help](https://support.microsoft.com/en-us/office/get-help-with-outlook-on-the-web-cf659288-35cc-4c6c-8c75-e8e4317fda11)

- [Exchange Team Blog](https://techcommunity.microsoft.com/t5/exchange-team-blog/bg-p/Exchange)

v t e Microsoft 365 History A product of Microsoft Microsoft Office 3.0 4.x 95 97 98 Macintosh Edition 2000 2001 for Mac XP v. X for Mac 2003 2004 for Mac 2007 2008 for Mac 2010 2011 for Mac 2013 2016 2019 2021 2024 Applications Desktop Access Excel OneNote Outlook PowerPoint Project Publisher Teams Visio Word Server SharePoint Excel Services Project Server Search Server Skype for Business Server Mobile Excel Lens OneDrive OneNote Outlook PowerPoint Remote Sway Teams Word Planner Web Bookings Copilot Delve Designer Excel Forms Loop OneDrive OneNote Outlook on the web Outlook.com Planner PowerPoint Project SharePoint Stream Sway Teams To Do Video Viva Engage Word Discontinued Discontinued shared tools Accounting Classroom Docs.com Entourage FrontPage InfoPath InterConnect Kaizala Liquid Motion Live Meeting Lync Mail Office Assistant Office Live OneDrive Groups PerformancePoint Server Photo Editor PhotoDraw Picture Manager Ribbon Hero SharePoint Designer SharePoint Workspace Skype for Business Snapshot Viewer for Access Vizact Word Viewer Technologies Information Bridge Framework Object Linking and Embedding Office Open XML Office XML formats Power Pivot Smart tags Visual Basic for Applications Related Microsoft Office filename extensions Microsoft Office password protection Microsoft Power Platform Microsoft Product Activation Office Genuine Advantage Category

v t e Digital calendars Standards iCalendar CalDAV DAViCal Web Calendar Access Protocol Webcal Related standards: SyncML vCard WebDav Active development 30 Boxes Any.do Artist Growth Cal (command) Calendar (Apple) Calendar (Windows) Cozi Central DAViCal Hiri EM Client EProductivity Evolution Google Calendar Holiline Reminder Ical (Unix) Kontact Lanyrd Mail (Windows) Meeting Maker Microsoft Outlook Web Outlook.com Lightning Sunbird Rainlendar Remember the Milk SabreDAV Sun Java System Calendar Server Upcoming Yahoo! Calendar Windows Live Mail wmCalClock Discontinued Chandler Ecco Pro HotJava Views Microsoft Entourage MobileMe Mozilla Calendar Project Now Up-to-Date Plan Sunrise Calendar Tempo Windows Mobile Device Center

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Adapted from the Wikipedia article [Outlook on the web](https://en.wikipedia.org/wiki/Outlook_on_the_web) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Outlook_on_the_web?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.