If you have multiple accounts in Outlook, when you compose a new email message, Outlook picks the default account as the From account.However, if you want to Reply, Reply All, or Forward a message, Outlook will send your message with the same account the original mail was sent to.For example, Cheryl has two accounts.

Learn how to use your Outlook inbox effectively with Microsoft Support's training resources.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

Need help with an Xbox console, an Xbox game, or Xbox network? Find out how to get in touch with us.

In Outlook, the black color theme includes dark mode, which provides a black background (instead of white) for the message window. You can switch to a white background for the message window if you prefer.

Learn how to upgrade your existing device to Windows 10 or buy a new PC. Get answers to common questions about upgrading to Windows 10.

Learn how to customize your keyboard for a specific language or format to control which characters appear on the screen when you press the keys.

Enter your password and select the arrow to continue. You’re now signed in to Skype.

How to use the COUNT function in Excel to count the number of cells that contain numbers, and to count numbers within a list of arguments.

Answers to questions on finding, getting, and applying product keys.