Working in an enterprise system. We need to determine if everyone needs to update to 10.6 at the same time for mxd cross-compatibility or can we update from 10.5 as needed.
[GIS] Opening MXD saved in one version using earlier version
arcgis-10.5arcgis-10.6arcgis-desktopmxd
Best Answer
You need to save a copy of the mxd to an earlier version if you have saved the mxd in ArcGIS latest version 10.6.
Based on ArcGIS help: Saving a map: