Outlook opened perfectly and once it is open, the network interfaces can be switched on again. Worked perfectly - clicked on the wifi icon at bottom right, clicked flight mode, opened Outlook, closed Outlook again, disabled flight mode and now Outlook is opening normally. Inside the VPN environment we can't reach Share Point, One Note, or social media channels normally, so one of them seemed to have been what Outlook was trying to connect to and couldn't reach in our case.
4] If you have a huge Outlook data folder, then this can cause temporary freezes as Outlook takes time to open each email or data folder.Right click on the Outlook 2016 shortcut and select the Compatibility tab. Still looking for a long term solution as I am afraid to mess with new profiles in case I lose downloaded emails.Untick the box next to 'Run this program in compatibility mode for: Windows 7 Service Pack 1'. OTHER THROUGHTS --------------- Why does Outlook search other network adapters? I've opened using Administrator but that didn't work. I also you recommend to just disable any network adapter you're not using. Ran the SARA (Support and Recovery Assistance) troubleshooting 12.If you find that your Outlook has stopped working, is not responding, or freezes or frequently hangs on Windows 10/8/7, then this post suggests some troubleshooting steps you can try.After that Outlook opened immediately and would close and reopen perfectly. Deleted the Outlook folder (including all OST files) and let things get re-created. I don't know why this worked, but i'm sharing it in case it helps anyone else. To do this, open Outlook program Hardware Acceleration uses computer’s hardware for performing a certain task and function faster than would be possible using software. So turning it off is one thing you can try if you receive a Program not responding message.One thing you want to know is that when you disable Hardware Acceleration for Outlook, it gets turned off for all Office programs.