Sign in to Outlook on the web with your work or school account. Go to outlook.office.com. If you're not automatically signed in with your work or school account, follow the prompts to enter the email address and password for your work or school account.

You also can go your calendar in Outlook on the web to add other people's calendars to your view. However, calendars opened this way won't appear in all of your Outlook clients. To ensure that other people's calendars appear in all of your Outlook clients, ask them to share their calendars with you.

Hotmail is now Outlook.com. Learn how to sign in to access your Outlook.com, Hotmail, Live, or MSN email account.

To join a Teams meeting without signing into an account: Open the meeting invite and select the link next to Join, or Click here to join the meeting. When prompted, select Continue on this browser or Join on the Teams app. You don't need to install the Teams app to join the meeting.

Hide, unhide, mute, pin, or mark a chat as unread in Microsoft Teams. There are numerous ways to organize your chats in Microsoft Teams. Hide or mute chat conversations from your chat list to stop receiving notifications or pin frequent conversations to the top of your chat list for quick access.

Unblock picture downloads for a single message. You can unblock downloads of linked pictures and other external content for a single message that comes from a trusted source. Choose the InfoBar at the top of the message, and then click Download Pictures.

In Microsoft Teams (free), you can start an instant meeting in no time! Easily reach out to your contacts, whether you're in a spontaneous mood or require a last-minute meeting. Do you want to create a meeting, but don't have an account for Microsoft Teams (free)? Sign up now.

A plus sign (+) in a shortcut means that you need to press multiple keys at the same time. A comma sign (,) in a shortcut means that you need to press multiple keys in order. This article describes the keyboard shortcuts in new Outlook for Windows.

You and your colleagues can open and work on the same Excel workbook. This is called co-authoring. When you co-author, you can see each other's changes quickly—in a matter of seconds. And with certain versions of Excel, you'll see other people's selections in different colors.

A security key is a physical device that you can use instead of your user name and password to sign in. Since it needs to be unlocked with a fingerprint or PIN, even if someone has your security key, they won’t be able to sign in without your fingerprint or PIN.