Hi,
The extra folders which you see on your email account like Archive, Conversation History, Sync issues are default folders.
Please don’t attempt to delete these folders. There are some chances that email synchronizing might stop if you attempt to delete these folders.
For more assistance please follow the below link to contact the MSN Technical support team.
https://support.microsoft.com/en-us/contactus/msn/explorer-tech-services/
Thanks
MSN Support Team