Question:

What happens when a PDF source file with annotations created in a third-party application (such as Adobe Acrobat) is uploaded to Vault? 

Answer:

If a user annotates a PDF source file in a third-party application and uploads it into Vault, the third-party annotations are flattened into the Viewable Rendition. The highlights of the third-party annotations are visible but the comments and/or metadata are not present in this document.

Related Documentation:

N/A