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Learn how to fix Outlook.com email sync issues if you can't receive or send messages.

Training: Get productive quickly with our Outlook Quick Start. Learn how to create and send email, and use @mentions to get someone's attention.

May 19, 2026 · Namespace: microsoft.graph Send a new chatMessage in the specified chat. This API can't create a new chat; you must use the list chats method to retrieve the ID of an existing chat …

Feb 25, 2026 · The Post a message in a chat or channel action can send a message using the following options: As the Flow bot: The message gets sent as the Flow bot instead of any individual users. Use …

Add a News post starting from the SharePoint start page In SharePoint, you can add news posts from your SharePoint start page. At the top of the SharePoint start page, click Create news post. Choose …

Get started with Sticky Notes Note You cannot currently have Sticky Notes stay on top of other applications. But you can pin Sticky Notes to the Windows taskbar to see your list of notes instantly …

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Properly authenticated messages received from [email protected], [email protected], or service.microsoft.com are legitimate messages that might be sent to your work or school account, …