Hello EphemeraDanica,
Good morning!
Thank you for publishing in Microsoft Community. We are happy to help you.
Based on the description you have shared; we understand thatTypically, the red alert triangle icon with exclamation mark usually indicates that there is an account issue with the organization, network or your Anti-virus. It usually doesn't appear on the web app, https://teams.microsoft.com/. Check on web if you have any sign in issues.
You could however try clearing the Teams cache and see if there's any difference or try signing out then sign in and select the org that has the warning sign.
To clear the Teams cache, you may follow the instructions on the link. Reference: Clear Teams cache - Microsoft Teams | Microsoft LearnHowever, to better understand the problem and provide a solution, we need more details from you, please provide us with the following information. Thank you.
1-Please are you using new teams if yes! the only way is to resolve the sign in issue of the affected account because in new teams
| Ability to sign out from the notification area at the far right of the taskbar (system tray). |
No longer available. |
Reference: What is changing in the new Microsoft Teams - Microsoft Teams | Microsoft Learn
2-Please may i know which windows are you using? Is it window 10 or 11, are you using new teams or classic teams
We look forward to your reply. This requested information will help us narrow down the scenario and find the right troubleshooting. We will continue to assist you based on the information you provide. I sincerely appreciate your patience and cooperation.SincerelyEben Ezer Tres | Microsoft Community Moderator