Users globally are currently experiencing issues viewing the body of emails. The temporary fix for this is to rollback a recent update as below.

Use Command Prompt and navigate to: C:\Program Files\Common Files\microsoft shared\ClickToRun\

Run the following Command: officec2rclient.exe” /update user updatetoversion=16.0.13901.20462

Relaunch Outlook and this issue is resolved. Please note this is currently a temporary fix.

Microsoft/Office is currently updating news on the issue here: https://twitter.com/MSFT365Status?ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Eauthor