We’re seeing a lot of issues where the solution is disabling compatibility mode on Outlook.exe. I’m not sure why it was ever enabled to begin with – it’s not needed on Vista or Windows 7 or any other Windows OS.
If you enabled compatibility mode, disable it. If you haven’t, don’t even consider it.
To disable it or confirm its not enabled, find Outlook.exe file and right click, then select Properties. Click the Compatibility tab in the Properties dialog and uncheck the Compatibility mode box that says “Run this program in Compatibility Mode”.
