ArcPy fails to execute ImportToolbox from ArcGIS Enterprise, even when using the UseSSOIdentityIfPortalOwned keyword.

Additional Information

Workaround

Use the ArcGIS Server connection file instead of directly specifying the URL.

1. Launch ArcGIS Pro and create a new project.

2. Establish a new connection to ArcGIS Server (in a federated environment, the ArcGIS Enterprise portal credentials are used).

3. Copy the ArcGIS Server to a shorter file path directory, for example, D:/ags. (Check the current ArcGIS Server path in the catalog pane > Project > Servers). 

4. Rename the ArcGIS Server connection file with a shorter name, for example, appsoporte.ags. 

5. Define these parameters in the tool: 

import arcpy

tbx = "D:/ags/appsoporte.ags;Utilities/PrintingTools"

print(tbx)

arcpy.ImportToolbox(tbx)

print(arcpy.PrintingTools.GetLayoutTemplatesInfo())

The tool runs without issues. 

Steps to Reproduce