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When a Windows service uses the system account to access resources, the service logs on with a set of null credentials. This is often a problem when attempting to utilize network resources that require a valid user. For example, utilizing mapped drives is only possible with valid non-null users; therefore, the system account cannot access mapped drives. There is, however, a method to enable the use of UNC paths. In Windows NT 4.0 and Windows 2000, there is a Server service registry parameter that allows you to specify by name which shares the system account can access. The registry NullSessionShares parameter allows you to specify lists of share names that can be accessed by the system account on any machine. The only shares a service using the system account can access are those listed in the NullSessionShares parameter. By default, no shares are accessible by the system account. The system administrator can add the names of shares the service needs access to the NullSessionShares parameter on servers where those shares exist.
The following edits will allow the use of UNC paths in AXL files and ArcIMS server configurations when the services use the system account.
This solves two problems in ArcIMS 3.0, and one problem in ArcIMS 3.1:
Warning: The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult with a qualified computer systems professional, if necessary. Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk.
Warning: Be very careful not to change anything in the registry except for the entries indicated. You can seriously compromise the integrity of your operating system by changing the wrong entries.By default, a shared resource configured in this manner is not secure. Be sure to follow safety guidelines when working with null session shares, such as the following:
Code: net config server /hidden:yes /autodisconnect:120