diff --git a/hololens/hololens1-release-notes.md b/hololens/hololens1-release-notes.md
index e36af959..645c4709 100644
--- a/hololens/hololens1-release-notes.md
+++ b/hololens/hololens1-release-notes.md
@@ -20,6 +20,13 @@ appliesto:
 > After December 10, 2024, HoloLens (1st Gen) devices will continue to function, however will no longer receive security updates or technical support.
 > There is no out-of-warranty support or inventory for device exchange.  Customers are encouraged to purchase HoloLens 2 if a replacement device is needed.
 
+| Last Known Good |  Version  |
+|---|----|
+| OS | Windows 10 - version 1809 |
+| Unity | [Unity 2019 LTS](https://unity.com/releases/editor/archive)|
+| MRTK | [MRTK 2](/windows/mixed-reality/mrtk-unity/mrtk2)|
+| Windows Device Recovery Tool | [WDRT 3.17](hololens1-recovery.md#go-back-to-a-previous-version---hololens-1st-gen)|
+
 ## HoloLens (1st gen) Long Term Servicing
 HoloLens (1st gen) has entered Long Term Servicing (LTS) state. Future updates will focus on issue and security fixes, while maintaining feature parity with the Windows 10 Holographic, version 1809 release for HoloLens (1st gen).