Microsoft Support and Recovery Assistant

 

Microsoft Support and Recovery Assistant is a Microsoft-made utility to fix a variety of problems associates with Office, OneDrive, and others, particularly Outlook because Outlook is the most complicated program in the Office Suite. 

https://support.microsoft.com/en-gb/office/about-the-microsoft-support-and-recovery-assistant-e90bb691-c2a7-4697-a94f-88836856c72f

If you know what the paperclip icon is, you will probably need to use this tool.