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HTTP 401 – Unauthorized Error after Successful Login

March 10, 2026 06:35 AM
1 min read

If after you have successfully logged into Aras Innovator, you receive a modal dialog that pops up with the text Server Error in ‘InnovatorServer/NotificationServer’ Application…The remote server returned an error: (401) Unauthorized there is most likely a missing component to your Internet Information Services (IIS) installation on your server.

Figure 47.

The previous modal dialog is subsequently followed by the error shown in Figure 48.

Figure 48.

To resolve this error, you need to install the Windows Authentication Role Service to into IIS by using the following steps:

  1. Open Control Panel --> Administrative Tools --> Server Manager.
  2. Right click on Web Server (IIS) under the Roles on the TOC and select Add Role services.
  3. Install the Windows Authentication role service located under Security.

Figure 49.

After you have installed the new Role Service for IIS you may need to uninstall Aras Innovator and install again.