Using Classic Outlook on Windows for personal email, calendar, and contact management
Dear guoji145
Good day! Thank you for publishing in Microsoft Community. We are happy to help you!
First of all, we apologize for the trouble and inconvenience caused to your work! Based on your description, I have a general understanding of what you mean, please first kindly try to use your account to log in Outlook Web App (https://outlook.office.com ) and check if Autoreply still displays.
In addition, please kindly close Outlook desktop app and start it again for test, you can also reboot computer and Outlook. If issue persists, please kindly temporarily turn off cached mode (in Outlook -> File -> Account Settings -> Account Settings -> select account and click “Change” -> untick “Use Cached Exchange Mode to download email to an Outlook data file”), restart Outlook for test. For your reference Turn on Cached Exchange Mode - Microsoft Support
Meanwhile, please also kindly check your MailTip by below PowerShell:
Get-Mailbox username | ft DisplayName, MailTip
If it’s MailTip, you can then use following PowerShell command to clear it:
Set-Mailbox username -MailTip $null
If your problem persists, please kindly share me more details and then I will do further research and tests, thanks.
Thank you in advance for your understanding! Your patience and cooperation will be greatly appreciated. I hope all the best!
Sincerely
Kerry Chen | Microsoft Community Moderator