We're developers for InDesign and we have an extension running at our customers. They use CC2019 and CC2015 and there's a problem with CC2015 now. I like to support our customer and I need an installer for InDesign CC 2015. Support Chat told me that this is not longer available and I should ask here.
This is what chat say when they do not have an answer. Old installers are not available from here or anywhere. This is a huge problem for everyone, especially extension developers, but Adobe do not seem to care even slightly.