Our fix for this common problem is just to add your DNS FQDN (for example: yourdomainname.local / yourdomainname.co.uk) as a DNS Suffix for the VPN connection on client computer. Please see the picture below.
If you’re using apps for Office, please see Apps for Office on the desktop or Apps for Office in the browser in the sections below for more specific requirements. Minimum requirements If you want to get the best out of Microsoft Office when using features with a browser, here’s the minimum browser version to use. At least Windows Internet