Using Classic Outlook on Windows for personal email, calendar, and contact management
Hello Simon Neate-Stidson,
I understand how irritating this can be, especially when the same behavior affects every message at the beginning of each day.
Since you mentioned using Outlook in the desktop Chrome browser, it appears that you are using Outlook on the web, rather than the classic Outlook for Windows application shown in the current tag. Therefore, troubleshooting steps involving Outlook Safe Mode, add-ins, or Windows profiles would not apply here.
Does the Chrome tab remain open overnight? Before deleting any messages tomorrow morning, please close the existing Outlook tab completely, open a new tab, sign in again, and then try deleting one test email. Alternatively, press Ctrl + Shift + R to force the page to reload before testing. If the email deletes normally after doing this, the issue is more likely related to an older browser session rather than the mailbox itself.
Please also confirm whether you are using a personal Outlook.com/Hotmail account or a work or school Microsoft 365 account, as the appropriate support route differs between the two.
If the message still returns after approximately ten seconds even in a newly opened session, you can contact Outlook.com Support by selecting Help in Outlook on the web, entering the issue, and choosing Still need help? when offered. You can also review Microsoft’s official guidance here: Delete email in Outlook.com.
Please let me know whether closing the overnight tab or refreshing the page before the first deletion changes the behavior. Thank you so much for your understanding.
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