DCOM Configuration < Applications > Properties pages: Identity tab

Project	More Information
Interactive User option button	Click to specify that the application runs under the identity of the user who is currently logged on to the computer. The security credentials of this user are used when authenticating an application to access resources.
Start user option button	Click to specify that the application runs with the security context of the user who started the application (the user who started the app) so that the application can be authenticated in the domain. The startup user can be an interactive user.
The following users option button	Click to specify that the application runs with the security context of the specified user account so that the application can be authenticated in the domain. Type the user name and password.
SYSTEM account option button	Click to specify that the server application runs with the security context of the built-in system account. This option is available only for applications that are installed as a service.

DCOM Configuration < Applications > Properties pages: Identity tab