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.

If your purchase of Office or Microsoft 365 came with a product key, you enter your product key on one of the websites listed below for your product. After you enter your key, you can download and install Office, or you can renew your Microsoft 365 subscription. Tip: Get tech expertise with Business Assist.

Post questions, follow discussions and share your knowledge in the Outlook.com Community. You can give feedback by selecting Help from the top menu, then Feedback. If you need help with Outlook.com, you can read our self-help content, or get support via email.

Reduce the size of pictures and attachments in Outlook email messages. Send large files by using file sharing, cloud services, or other solutions for working around file size limits in Outlook.

After submitting a recall request, usually less than 30 seconds later, you will get an email notification with the subject "Message Recall Report for message [original message subject]". Select the View Message Recall Report link to view the report in your browser.

Here's how to change the size of text, images, and apps in Windows. To change your display in Windows, select Start > Settings > Ease of Access > Display. To make only the text on your screen larger, adjust the slider under Make text bigger.

You can manage all of your Microsoft subscriptions in your Microsoft account dashboard. Select each subscription to change when and how you pay, or to see order history & receipts. Choose your account type.

On the View tab, select View settings in new Outlook. Select Accounts > Automatic Replies . Select the Turn on automatic replies toggle. Select Send replies only during a time period, and then enter start and end times. Under Send automatic replies inside your organization, enter the message to send while you're away.

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.

From the Overview page, select Office apps and on that page, find the Microsoft 365 product you want to install and select Install. To install Microsoft 365 in a different language, or to install the 64-bit version, use the dropdown to find more options.