I thought I’d post a solution to this 407 proxy authentication problem in case any others strike this problem.

Sparx Enterprise Architect (with eaDocX) uses the following registry settings for Internet access:

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternet Settings]
“MigrateProxy”=hex:00000001

[HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternet SettingsConnections]
“DefaultConnectionSettings”=hex:46000000…etc…
“SavedLegacySettings”=hex:46000000…etc…

These registry settings are updated by Internet Explorer proxy settings when Internet Explorer is used. The IE proxy settings are stored in [HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternet Settings] as plain-text values.

In our case, Sparx EA is deployed as a published application, which means Internet Explorer is not available to the user from that application server (except if you go to Help > EA on the Web).

To resolve this 407 problem, the required registry settings are deployed via Group Policy Preferences, using values captured after Internet Explorer created them.

The good news is that we didn’t need to modify the .config file to get eaDocX working.