Revit Server: Authentication options prevent Revit Server from working

Autodesk Support

Jan 3, 2025

Products and versions covered

Issue:

Revit Server requires that Anonymous authentication be enabled for most of its application pools, if this is disabled then it may stop functioning.

No logging will be made for the affected application pool (e.g. no ModelService.log file is created when trying to interact with the host server).

Solution:

Enable Anonymous Authentication

  1. On local server where Revit Server is installed, open Internet Information Service (IIS) Manager.
  2. Expand the list of Connections and click on 'Default Web Site'.
  3. In IIS, click on the 'Authentication' icon.
  4. Then enable 'Anonymous Authentication'.

IIS.png
 
The animated GIF below shows how to proceed:
 
Anonymous Authentication.gif

Additional Articles

For more articles on this error, see the following article "This operation could not be completed. Please try again" when working in Revit Server

Products:

Revit; Revit Architecture; Revit MEP; Revit Structure;

Versions:

2013; 2014; 2015; 2016;

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