When you sign in to Teams on your mobile phone, your chat history may appear empty. This often happens after switching between work and personal accounts or after a new device setup. The cause is usually a sign-in error that prevents the app from syncing your conversation history from the cloud. This article explains why … Read more
When you chat with a contact that belongs to a shared mailbox in Microsoft Teams, the conversation history sometimes disappears. The chat list shows no previous messages, even though you know the conversation existed. This problem usually happens because Teams stores chat history per user account, not per mailbox. The shared mailbox contact has no … Read more
After upgrading to the new Teams, some users find their chat history has disappeared. This happens because the new Teams app stores chat data in a different local cache location. The issue is often temporary, but it can look like your messages are gone forever. This article explains why the chat history vanishes and gives … Read more
When you open the Teams desktop app and click the New Chat button, nothing happens. The chat window may not appear, or the compose box stays gray and unresponsive. This usually happens because of a corrupted Teams cache, an outdated app version, or a policy that blocks chat creation. This article explains the root causes … Read more
You open Teams in your browser, click the New chat button, and nothing happens. The chat window does not open, or the message input field stays grayed out. This issue usually comes from browser cache conflicts, disabled third-party cookies, or an outdated service worker. This article explains the root causes and gives you step-by-step fixes … Read more
Microsoft Teams on your desktop may stop starting new chats after you sign in on your mobile device. The New Chat button appears grayed out or does nothing when clicked. This usually happens because the mobile sign-in changes your presence status or syncs a cached profile that conflicts with the desktop client. This article explains … Read more
When you open Teams and try to start a new chat with a contact that belongs to a shared mailbox, the chat window may fail to open or show an error. This problem often appears after a policy change or after the shared mailbox was recently added to your profile. The root cause is usually … Read more
Your Teams desktop app stops showing notifications right after you sign in on your phone. The alert banner, the sound, and the taskbar badge all go silent. This happens because the mobile sign-in triggers a background refresh that resets the desktop notification state. This article explains why the desktop client loses its notification settings and … Read more
When a contact associated with a shared mailbox sends you a message in Microsoft Teams, you expect a notification. Instead, you see nothing until you open the app. This problem usually comes from notification policy settings, the contact’s presence state, or how Teams handles shared mailbox activity. This article explains the root cause and gives … Read more
After you switch from classic Teams to the new Teams app, notifications may stop appearing for chats, mentions, and channel posts. This usually happens because the new app resets notification settings, Windows focus assist blocks alerts, or the app runs without the required background permission. The new Teams client is a progressive web app that … Read more