Using Classic Outlook on Windows for personal email, calendar, and contact management
Hi!
Do you know which upgrade/update that was pushed out? Was it a windows update or was Outlook updated?
If you could check which KB updates were installed around 25th June, go to Control Panel > Programs and Features > View installed updates
I suspect it is one of the windows updates and if located that one could be uninstalled to see if it works better after that.