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Please kindly understand that the Outlook tag here we mainly focus on general issues about Outlook desktop client. Looks like the issue is more related to your account, it's suggested that you could post your case in dedicated forum for Hotmail for more professional advice.
This issue can be quite concerning, especially when important emails seem to have disappeared. Here are a few steps you can take to try and recover your emails:
- Log in to your browser client to check if the email disappears.
- Configure the Hotmail account to IMAP or Exchange in Outlook.
- Check if a filter was applied to the default view settings of the Outlook folder. In the ribbon, select the View > Current View > View Settings. Select Filter.
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