iPadOS 9.9.11.0 (build 15A372) is an official Apple over-the-air update for the iPad Pro 12.9-inch (WiFi), released on 2017-09-12T19:09:02Z. The update package is 1.34 GB. This is a delta (partial) update that requires 9.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b73a9e5c10c0044743eeecff0d31cc8f3b6e362b.zip.