ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Core Namespace / Item Class / SourceModifiedTime Property
Version

SourceModifiedTime Property (Item)
Gets and sets the time when the item's source item was last modified
Syntax
public TimeInstant SourceModifiedTime {get;}
Remarks
When a web map is added to a project, the map in the project has a source modified time that can be compared to the original web map's modification time. The map can be synched with any updates made to the web map.
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also