CRM 2016 On Premise "Reply in Outlook" is no longer working for some users

A user has reported that when he opens an Email from a Case and then clicks the "Reply in Outlook", the new Outlook email does not contain the email conversation history present in the CRM email record.

He is using Chrome.  In IE and Edge the button does not seem to function at all.

Another user logged in and has the same issue.

The PC is a new one which is built by out IT department.  I wondered if this was being caused by the firewall, group policy, script restriction or some other configuration setting.

I just tried on my PC and in Chrome I get a GUID in the body of my email.  My PC is a relatively new one so may have similar restrictive settings.  All the users gets is a string of text which says something like "==== Original Mesaage =====" and nothing else.

Any ideas for a solution?