Dear 進小坂
Good day!
Thank you for posting to Microsoft Community. We are glad to assist!
Based on your description, could you kindly allow me to confirm your issue?
May I know whether you are using Microsoft 365 Business subscription, Microsoft 365 Family/Personal account(Such as Outlook.com/Hotmail.com/live.com) or any other subscription?
May I know whether you have contacted support team and get this ticket number?
If yes, may I double confirm whether your issue is related to Microsoft Teams or other Microsoft products (such as Windows, office applications)?
I look forward to your response.
Thanks for your precious time and your understanding would be highly appreciated. Have a nice day!
Best regards,
Allen | Community Moderator