You type a message in Teams on the desktop app, press Enter, and nothing happens. The message stays in the compose box or shows an error icon. This usually happens because of a network interruption, a stuck Teams cache, or a corrupt local file. This article explains the exact causes and gives you a step-by-step … Read more
When you use Teams on the web, a message that refuses to send can halt your workflow. You see the error icon next to the message, and your text stays in the compose box. This problem usually comes from browser cache, network restrictions, or a stale sign-in session. This article explains the root causes and … Read more
After signing in to Teams on your mobile device, you may find that messages fail to send, showing a red exclamation mark or a spinning clock icon. This usually happens because the mobile client has not fully synchronized with the server after the sign-in process. The cause is often a stale authentication token or an … Read more
When you try to send a message in Teams to a contact whose email address belongs to a shared mailbox, the message may fail with an error such as “We couldn’t send your message.” The root cause is that Teams treats shared mailbox addresses as unverified external recipients, and your organization’s external access policy blocks … Read more