If you can't sign in to your Outlook.com, Hotmail, Live, or MSN email account, or you're not sure how to sign in or sign out, here are some solutions.

Post questions, follow discussions and share your knowledge in the Outlook.com Community. Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

My messages are missing or disappearing. Change your password in Mail. Mail and Calendar FAQ. This article tells you how to add email accounts to the Mail and Calendar apps so you can start sending and receiving email and creating and managing events.

The Encrypt button contains both encryption options (S/MIME and IRM). The S/MIME option is only visible if you have an S/MIME certificate configured in Outlook. For detailed instructions on adding encryption, check Encrypting with S/MIME or Encrypt with Microsoft 365 Message Encryption.

Getting ready for the Windows 11 upgrade. How to check if your device meets Windows 11 system requirements after changing device hardware. Learn how to use the PC Health Check app to help you improve your device performance.

The VLOOKUP and HLOOKUP functions, together with INDEX and MATCH,  are some of the most useful functions in Excel. Note: The Lookup Wizard feature is no longer available in Excel. Here's an example of how to use VLOOKUP. =VLOOKUP (B2,C2:E7,3,TRUE) In this example, B2 is the first argument —an element of data that the function needs to work.

If you're moving from a Windows 7 or Windows 8.1 PC to a new Windows device, you'll find that the best way to get apps and games is through Microsoft Store. Microsoft Store is familiar on any device—you can search for free and paid apps like Adobe Reader, view their popularity and ratings, and download them to your device.

Get Microsoft 365 support, help, and learning resources. Organize your life, expand your creativity, and protect what’s important with Microsoft 365

Go to Start > Settings > Accounts > Sign-in options. Select the Windows Hello method that you want to set up, Select Set up. If you don't see Windows Hello in Sign-in options, then it may not be available for your device. Windows Hello does require a compatible camera or fingerprint reader.

Select the Dial icon to start your call. If you don't have Bluetooth available on your device (or if it's been turned off), you won't be able to make or receive calls on your PC. If you encounter issues while using the calling feature, these troubleshooting tips may help.