We are pleased to announce that the upcoming Lucity 2017r2 release (Aug 2017) will support Esri® ArcGIS 10.5.1. Lucity 2017 also supports this latest ArcGIS release. Earlier versions of Lucity that fall under active maintenance can be upgraded to 10.5.1, but may require some additional steps as outlined in this knowledge base article.
For those that have yet upgraded beyond ArcGIS 10.4.1, 10.5 is not your typical maintenance and quality improvement release. There are some major changes included in 10.5 especially to ArcGIS for Server and named user levels. With 10.5.1 there are some significant upgrades and a simpler deployment of ArcGIS Enterprise. We understand how change can feel overwhelming at times, so we are offering a few sessions at Lucity ACT 2017 dedicated to ArcGIS Enterprise! Be sure to check out these sessions if you are going to be in Kansas City attending our annual event.
Feel free to contact a Lucity support representative for more details, or refer to the Lucity Support Center for updates to our ArcGIS version support.