You may need to grant users of the Enterprise Vault Web Access application access to the IIS computer, using the local IIS computer accounts database, not the domain accounts database.
To enable remote access to the Web Access application computer
Click Start > Programs > Administrative Tools > Local Security Policy.
In the Local Security Policy window, expand the Local Policies container.
Set up Integrated Windows Authentication access by following the steps below in the order listed:
With User Rights Assignment still selected in the left pane of the Local Security Policy window, right-click Access this computer from the network in the right pane and then, on the shortcut menu, click Properties.
Check that the Users group appears in the Local Security Setting list.
If you do not want to add the Users group, see the other options below.
By default, the Users group includes Domain Users. If the Users group does not include Domain Users, or if some Web Access application users are in a different domain, you must do one of the following:
The Enterprise Vault Web Access application is now set up and ready to be used by users in the same domain as IIS.