Dear Lisa,
Greetings. Thank you for reaching out.
Can you kindly provide me with more information to get more details from the team on this? Thanks in advance. Since you posted in the Microsoft Teams app category, may I please confim the application you are using or referring to? Is it Teams for mobile (iOS/Android) or Teams for desktop (Mac/Windows)?
->Also, is the flash alert meant for notifications for new messages, meetings?
Kindly note that this above requested information is required for further analysis and troubleshooting of your situation. Your patience and cooperation are much appreciated.
Looking forward for your response.
Best Regards,
Ashraf.