Sadly the improperly configured Outlook clients are still not extinct in some of the organizations we work with. Does anyone know a good guide (with screenshots would be ideal) of the settings they would have to change?
Unfortunately it's not only the clients it's the servers as well. Also this is still occasionally an issue in Office 365
This guide doesn't look bad - https://capsulecrm.com/support/setup-and-configuration/micro...
The official Microsoft article - Change the message format to HTML, Rich Text Format, or plain text - https://support.microsoft.com/en-us/office/change-the-messag...
And of course the Microsoft Exchange article - https://docs.microsoft.com/en-us/exchange/tnef-conversion-op...