Sometimes Outlook may need to be re-installed or repaired in order to fix certain problems.
REINSTALL OFFICE 365 WINDOWS 10 UPGRADE
Tip: If you want to reinstall Windows 10 on a PC that already has Windows 10 activated, use the Upgrade this PC now option. Open the downloaded tool, and choose Create installation media for another PC. To resolve this issue, please use the steps below to run an Online Repair of Office. Step 1: Download the media creation tool from Microsoft. This issue appears to be caused by a bad Outlook/Windows Update.
When you get it fixed, read our post Why Windows XP was better than Windows 10 for entertainment.ฤก: Outlook "No Default Mail Client" Error: As of 9/16/20 we have reports of CompanionLink giving a "No Default Mail Client" error on sync.
See our friends at Bleeping Computer for a full rundown. 1: Outlook bug prevents viewing or creating email - A Microsoft introduced a new bug today where some people are Unable to Edit or Create Email Update: Microsoft says they will roll this fix in the next 8 hours.