As part of Microsoft's transition to the unified Copilot app, the company removed several consumer capabilities.
Deep Research and Podcasts were removed from the app.
Threads, messages and images created in the old Group Chat were also not automatically transferred to the new experience.
Microsoft advised users wanting to preserve information to copy messages and download images before the transition.
This change dates to August 18, rather than a new update from recent days, but matters to users moving to the new experience.