Symantec VIP integration with ADFS fails to authenticate users with error: Microsoft.IdentityServer.Web.WebConfigurationException: No style sheet is configured in the active theme for default locale [en-AU/3081].
Note: This error can be observed for all regional Locale languages configured other than en-US.
This error occurs when the ADFS Service Account Locale is not configured to en-US.
When configuring the AD FS Server, the locale of the ADFS Service Account must be set to en-US.
As a client-side workaround, the browser locale on all impacted machines can be followed until the locale of ADFS service account gets configured to en-US locale as per recommendation on the AD FS servers.
Note: This issue can appear on any browser where English United States Language is not set as the first preference in the browser language settings.
Please contact Microsoft Vendor regarding on how to change or install locale of ADFS service account in en-US.