auto run plug-in (user/app defined)
Allow user to install plug-in with the option to auto-run the app (or plug-in as the option to turn on auto-run) so the user doesn't have to active the plug-in each time.
Hello and thank you for your suggestion! We’re excited to announce that we have support for auto-opening add-ins. Please check it out at https://github.com/OfficeDev/Office-Add-in-Commands-Samples/tree/master/AutoOpenTaskpane and give us feedback.
Office Extensibility Team
Users may not want to activate the plug-in each time.
Sunny Dhindsa commented
I second this! I would love to see this feature.