Hello Ashwini,
Welcome to our forums.
Currently we do not have built-in support for Office 2019, but we are already working on this and it should be available soon. When so we will update this forums thread.
Until then, as a workaround you can still try to use our current project template for Office Addins and use the configuration settings we currently have for Office 2016. Just open Advanced Installer, use the [New] -> [Add-Ins] -> [Office Add-In] project template to create a new setup project, walk to the wizard dialogs and on the targeted Office version dialog configure it like that:
- addin.jpg (58.65 KiB) Viewed 4730 times
Let us know if this helped.
All the best,
Daniel