Hello,
how will I be able to tell what scripts need to be rewritten?
In most cases, you just need to install the version of a module for PowerShell 7 and that should be it. At the same time, there are modules/cmdlets that do not support PowerShell 7. In this case, you will need to check for alternatives.
Also, do I need to pre-install Powershell 7 on my servers?
No, there is no need for that.
I have a 2 server environment with an external data base but I can't find the upgrade instructions for this type of upgrade I used to have a link can you provide that?
Have a look at section Upgrade multi-server configuration of the installation guide: https://www.adaxes.com/help/InstallationGuide/#upgrade-multi-server-configuration.
I have several different web views for several different teams and uses. Will existing permissions change?
No, nothing should change.