Outlook Login Errors - DO NOT NEED TO LOG INTO A MS ACCOUNT

Brand new laptop that I placed into the domain and connect to an on-premise exchange server. Everything worked fine until I left the office now on a different network (outside the LAN) MS Office prompts for a Microsoft account username and password. The version of MS Office was purchased stand-alone with a product key. I don't need nor want to have any MS account associated with this installation. All other devices on my network log into Outlook after the license key was entered and do not have a Microsoft Account connected to them or have a MS account prompt for the password. This has to be something on the computer. Likely a setting where the idiots at MS have to "F" with everything.

Sorry for the attitude, already spent over 2 hours with idiots from MS basically clueless so I'm asking the Experts.