Microsoft Outlook

Version365(as of 9/16/2021)
PlatformsWindows, Mac, iOS, Android
Go to Website
Rating:3.7  |  128 Votes

Main Features

  • Quickly view your schedule, appointments, tasks, or contacts with the Peek feature
  • Keep tabs on your social media in one place with Facebook and LinkedIn integration
  • Search all of your emails, attachments, appointments, and contacts with Improved Search
  • Check the weather forecast with the built-in Weather Bar

Software Overview

Screenshot of Microsoft Outlook 365
Screenshot of Microsoft Outlook 365

Microsoft Outlook is an email client and personal information manager for Windows and macOS. It is available as part of Microsoft Office but can also be purchased as a standalone application. A mobile version is bundled with Windows Phone, and it is also available for Android and iOS.

Outlook has many features that help you keep track of your contacts and schedule. It has filters and Context Commands that allow you to filter your calendar and intuitively sort your email. You can integrate multiple contacts into a single view to see each contact's information and social media status.

The program allows you to sync your information with mobile devices and Internet services so that you can access your calendar and email anywhere. You can also share your calendar with other people and send meeting requests.


Outlook is a widely-used email client that also provides tools for organizing contacts and calendars. It also syncs all your information across signed-in devices allowing you to access emails, contacts, and appointments wherever you are. Microsoft Outlook is a great email and organizational tool for both personal and business users.

Primary File Type

msg icon.MSGOutlook Message Item File

Supported File Types

ExtensionFile Type
.MSGOutlook Message Item File
.BCMBusiness Contact Manager File
.BCMXBusiness Contact Manager Customization
.DATExchange E-mail Attachment
.DBXOutlook Express E-mail Folder
.EMAILOutlook Express Email Message
.EMLE-Mail Message
.HOLOutlook Holidays File
.IAFOutlook Internet Account File
.ICALiCalendar File
.ICALENDARiCalendar File
.ICSCalendar File
.IDXOutlook Express Mailbox Index File
.MBOXEmail Mailbox
.MBXOutlook Express Mailbox
.MIMMulti-Purpose Internet Mail Message File
.MIMEMulti-Purpose Internet Mail Extension
.MMEMulti-Purpose Internet Mail
.MMFMicrosoft Message File
.MSOOutlook In-Line Office Attachment
.NCHOutlook Express Folder File
.NWSWindows Live Mail Newsgroup File
.OABOffline Address Book
.OBIOutlook RSS Subscription File
.OFTOutlook File Template
.OLMMac Outlook Database File
.OSSMicrosoft Outlook Saved Search File
.OSTOutlook Offline Data File
.OTMOutlook Macro File
.P7SDigitally Signed Email Message
.PABPersonal Address Book
.PRFOutlook Profile File
.PSTOutlook Personal Information Store
.PWIPocket Word Document
.RPMSGOutlook Restricted Permission Message
.RWZOutlook Rules Wizard File
.SIGSignature File
.SRSOutlook Send/Receive Settings File
.TNEFTransport Neutral Encapsulation Format
.VCFvCard File
.VCSvCalendar Event
.WABWindows Address Book

Additional Related File Types

ExtensionFile Type
.CLXCeelox SecureMail Secure Message
.CVRMicrosoft Crash Report File
.DICPROOFMicrosoft Dictionary Proofing File
.ECFOutlook Add-in
.FFAFind Fast Status File
.FFLFind Fast Document List
.FFOFind Fast Document Properties Cache
.FFXMicrosoft Find Fast Index
.GXKGalaxkey Secured File
.KMRKnowledgeMill Link File
.MS-TNEFMS Transport Neutral Encapsulation Format
.NICKOutlook 2000 Nickname File
.NK2Outlook 2002 Nickname File
.ODSOutlook Express 5 Mailbox
.OLKOutlook Address Book File
.OLK14CATEGORYOutlook Category File
.OLK14CONTACTOutlook Contact File
.OLK14EVENTOutlook Calendar Event File
.OLK14GROUPOutlook Group File
.OLK14MAILACCOUNTOutlook Mail Account File
.OLK14MESSAGEOutlook Message File
.OLK14MSGSOURCEOutlook Email Message Data File
.OLK14NOTEOutlook Note File
.OLK14PREFOutlook Preferences File
.OLK14SIGNATUREOutlook Signature File
.OLK14TASKOutlook Task File
.P10Certificate Request File
.P7RCertificate Request Response File
.RGEEntourage File Archive
.ZDBZimbra Database File
Updated 9/16/2021