Hi @qiuyi pan ,
Welcome to our forum!
Please kindly understand that Outlook 2010 is currently out of support, so we can't test in Outlook 2010. According to your description, I created a teams meeting in my outlook 365 and forwarded it as an ics attachment to other user.
When other users click accept, there is no option to send a response, and I can't check the status of meeting participation, which is consistent with your result. It seems that this is by design.
Based on my experience, when you create a Teams meeting in outlook and send it directly instead of sending it as an ics file to the meeting participants, the recipients can accept and respond back, so that we can view the meeting participation in the meeting tracking. It's suggested that you could try to send a Teams meeting directly to the meeting participants.
Hope to help you!
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