New answers tagged solution-package
I have since discovered that SharePoint will silently fail to import Navigation Termsets if the TermSet Administrator is incorrectly set at the top level. But it will pull through the other termsets. Going to Central Admin Term Store Manager (_layouts/15/termstoremanager.aspx) make sure the Term Store Administrators are set up as the user you want to run ...
You can deploy apps locally if you have the app package. You upload them into the site catalog and they will be made available to your site collections. You won't be able to utilize apps deployed to the MS store. You would need to contact the vendor directly to see about obtaining an .app package or code your own and deploy them.
Top 50 recent answers are included