Description:
When URL to DSM Web Console is brought up the user is prompted with User Name, Password, Security Authority, and Security Provider.
The latter two are already populated with the name of the domain and "winnt" respectively.
When the user enters Windows credentials, an error occurs stating: "Unable to connect to Web Service({http://xml.apache.org/axis/}HTTP)".
The Event Viewer lists an error like "authentication failed for IUSR account".
Solution:
The root cause for this problem is due to the IUSR password getting corrupted or changed and not being in sync with the IIS Meta database password.