Common Fixes for Outlook on Mac

From OIT:

These connection problems are very common on Macs, but unfortunately we haven’t found a single solution that fixes them all.  Here is a list of the most common fixes:

1.   Reconfigure wifi/network settings:

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_mac-mso_mac2016/outlook-mac-says-not-connected/20fded85-ee20-460f-b540-92286609b303

2.   Delete the Outlook cache:

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_mac-mso_mac2016/intermittent-server-disconnects-from-outlook-for/5b15bb0f-f04c-4c6e-b078-fa18c1552275?auth=1

3.   Delete the KeyChain entry:

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_mac-mso_mac2016/office-2016-mac-outlook-will-not-connect-to/fca00b50-aae5-4549-ae2e-ca46ea563c59

4.   Do a full uninstall/reinstall (including library files):

https://support.office.com/en-us/article/troubleshoot-office-2016-for-mac-issues-by-completely-uninstalling-before-you-reinstall-ec3aa66e-6a76-451f-9d35-cba2e14e94c0?ui=en-US&rs=en-US&ad=US

5.   Remove Outlook profile and then add it again
6.   Update Outlook to the latest version

Also seen problems solved on early versions of Mac OS High Sierra by upgrading to High Sierra v10.13.3