Incoming emails from one senders moved to Outlook RSS Feeds Folder

Issue

Emails from one particular sender are getting automatically moved to user’s MS Outlook RSS Feeds folder. Outlook Rules and Alerts doesn’t show any rules.

Resolution

The issue was resolved by starting Outlook with cleanserverrules switch (Start > Run > outlook.exe /cleanserverrules).

June 2018
MS Office 36 / Exchange Online
MS Outlook 2016