Custom Installation Prompt - AlivaJG/PSAppDeployToolkit GitHub Wiki
A custom prompt with the toolkit branding can be used to display messages and interact with the user using the “Show-InstallationPrompt” function. The title and text is customizable and up to 3 customizable buttons can be included on the prompt as well as optional system icons, e.g.

Additionally, the prompt can be displayed asynchronously, e.g. to display a message at the end of the installation but allow the installation to return the exit code to the parent process without waiting for the user to respond to the message.
