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.

To use Microsoft 365 on your new device, you can activate Microsoft 365 as a 1-month trial of Microsoft 365 Family. You can also buy Microsoft 365 or a non-subscription version of Office, add Microsoft 365 to an existing Microsoft 365 subscription, or enter a product key from a new product key card.

Advanced Outlook.com security for Microsoft 365 subscribers. Learn about encrypted messages in Outlook.com. Encrypt messages using S/MIME in Outlook on the web. Signing your email messages with a digital ID helps to prove your identity and prevent message tampering.

Learn how to redeem a gift card, code, or Office product key and spend your balance at Microsoft Store online, on Windows, or Xbox.

This article describes how you can digitally sign a macro project on Windows by using a certificate. If you don't already have a digital certificate, you'll need to get one. Tip: To use or test macro projects on your own computer, you can create your own self-signing certificate by using the Selfcert.exe tool.

Change from a 32-bit version to a 64-bit version or vice versa. Activate Windows. Fix Bluetooth problems in Windows. Learn how to install, reinstall, or activate Microsoft 365 or Office 2019 on a PC or Mac.

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

Save a message as a file on your computer or in the cloud. In Mail, from the message list, select the message you want to save so it opens in the reading pane, or double-click the message to open to open it in a new window. From the message header, select More actions > Save as.

SharePoint is a browser-based app that you connect to through your web browser, like so: Go to office.com, and sign in to your work or school account. In the upper left corner of the window, select the app launcher > All apps > SharePoint.

Add a shared mailbox to Outlook mobile. Open a shared Mail, Calendar or People folder in Outlook for Mac. Learn how to open a shared mailbox in Outlook. Shared mailboxes let a group of users view and send email, and share a calender, and open a contact list from a common mailbox.