The 10.9.1 release of ArcGIS Pipeline Referencing Server includes minor enhancements to the software and the documentation; no major new functionality is included with this release.
The stand-alone Location Referencing Server installer is no longer necessary in 10.9 or later releases. However, the software must be authorized using your Location Referencing license key on each machine on which it is installed.
Learn more about enabling Pipeline Referencing Server in ArcGIS Server 10.9.1
You can download the ArcGIS Event Editor from My Esri.
Note:
For a complete list of enhancements and issues addressed, visit the product download page.