server your're connecting to has Unknown installed

Isaiah_C​ I did see that post, but it's a little ambiguous.

To resolve the issue, you need to uninstall the current version of AccountRight from your computer. You can do this by going to the Windows Control Panel, selecting Programs and Features, and then uninstalling the software. After that, download and install the full installer for the new version from this link. Additionally, you will need to speak with your network administrator or IT professional to install the new server version on your network. This should allow your boss to log in to MYOB without any issues.

What's the "full installer"?
The link doesn't show the latest version.
If we have used the "full installer" why does the network admin or IT professional need to then install the new "server version" on the network?
This MYOB support article states that you install the server version on the computer where the local data files will reside and then the other computers acting as workstations are to install the PC edition.

I don't wish to waste time testing these different scenarios, so what's the exact steps and software required?

Hi someone,

I understand how unexpected messages like this can really interrupt the workflow, especially when everything has been running smoothly for a long time. Even though both the server and workstation are showing the same version, sometimes the system doesn't fully recognise the update across the network, and that's what leads to the "Server update required" message. We've actually got a post that covers this exact situation and walks through how to resolve it: Server update required | MYOB Community.

Regards,

Sai