Hi @Handian Sudianto ,
Welcome to our Q&A forum!
Regarding your issue, below are some suggestions:
1.Please login and verify if it still happens in Outlook Web App (OWA). Double check if there are any rules listed.
2.Go to Outlook client, File > Options > Advanced > Outlook start and exit and check the box Start Outlook in this folder set to Inbox. As below:
- Try to remove and reconfigure the user account and profile to see if the problem preexists.
If none of above works, kindly provide the detailed version of your Outlook client.
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