Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi Triline Production,
Thanks for your updates, I suggest you try the following for troubleshooting:
#1. You can update the Office desktop client first to see if the problem disappears after the update. The latest version 2106 (Build 14131.20320).
#2. except for updating, you can also try safe mode, this step mostly tests if issue is related with any Outlook add-ins and startup items: Right-click the Startbutton and click Run. > Type Outlook.exe /safe and click OK.
#3. Try to create a new mail profile and reconfigure your email account in the new profile (don’t delete the old profile): Create an Outlook profile - Outlook (microsoft.com)
Best Regards,
Linda