This service can be installed on primary, backup, or member SNA Server computers within the SNA Server subdomain.
The Host Account Synchronization Service supports third-party interfaces to various host security databases, which lets you coordinate password changes between the Windows NT security domain and the host security domain.
This service is not necessary if you use the single sign-on feature with manual password updates in which the administrator or users store host account information in the Host Account Cache by means of the Host Account Manager application (UDConfig).