Waiting for a page to load - Outlook
I've had a few instances of Dynamics records not showing in the Outlook client this week. It turns out that an update to Outlook is the cause as described in this Microsoft article: https://support.microsoft.com/en-gb/help/4049314/microsoft-dynamics-365-for-outlook-is-unable-to-render-webpages-after
The interim fix is to add a registry key to each user's computer. The key is described in the above article.