Hi Sir/Madam,
I have been working in Office Plug-in/Add-in development for 10 years. I developed many plug-ins/add-ins for Outlook, Excel, Project, Word applications like Project Communication Plugin with SharePoint, Work item package management with Microsoft SQL Server, Task Health Checker with Project, etc.
I export those apps with executable files or ClickOnce apps on the Office. I can create an executable file for Plug-in to install the plug-in from Terminal Server.
Please let me know if you have any questions.