Hi @Chris ,
According to your description, I understand that after you organize a meeting, when a participant accepts the meeting and chooses "Do Not Send a Response", you can't see whether the participant accepts the meeting through the meeting tracker, right?
Based on my test, I found that this issue occur on different versions of outlook clients. I've done a lot of research, but I there seem not to be a way to change it. I'm afraid it's the design.
Through my research, as a workaround, it is suggested that you could select the option shown in yellow in the following figure(File>Options>Mail>Under tracking). By adjust your Tracking options, you can automatically delete empty Meeting responses without losing the tracking functionality after the participants choose Send the Response Now to reply.
In addition, if you indeed need the function that the status of whether to participate in the meeting can be displayed normally through the tracker after the participants accept the meeting request and choose Do Not Send a response, it's suggested that you could post the feedback in Outlook client>File>Feedback. Hope Microsoft will pay attention to them later.
Thank you for your support and understanding. I hope your problem can be solved as soon as possible.
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