Using classic Outlook for Windows in business environments
Hello,
Welcome to Microsoft Community!
Are you talking about replying to a thread when suddenly many other threads are created? It's possible that you're viewing other threads, causing it to show up in your activity. This should not be the thread you created. If it's convenient, could you take a screenshot and show us how it creates multiple threads?
Feel free to post back if you have any additional questions.
Best Regard,
Mancy | Microsoft Community Support Specialist
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