Office 365, Email, Outlook inbox corruption (missing email, can't open email, etc.)

I'm missing email or folders, or having connection issues.

How to repair the Outlook data files

See the following Microsoft Support Page: https://support.office.com/en-za/article/Repair-Outlook-Data-Files-pst-and-ost-25663bc3-11ec-4412-86c4-60458afc5253?ui=en-US&rs=en-ZA&ad=ZA.