Default Accounts and Services

During installation, Application Center Setup:

• Verifies that the computer on which you're installing the product meets certain mandatory requirements, such as the operating system version.
• Creates the specific groups and user accounts that it requires.
• Installs and starts the services that it uses.

Table 4.1 summarizes the group and account information that Application Center creates and uses, as well as the existing IIS account information.

Table 4.1 Application Center User Groups and Accounts

Group/account name	Description
Group: ACA_ machinename	Application Center group. This account is used for logging and other administrative operations.
User: ACC_ machinename	Member of ACA_machinename. This cluster controller account is created on each cluster member. This account is used to manage cluster communication it authenticates across servers, replicates content, and administers the cluster servers.1
User: ACL_ machinename	Member of ACA_machinename. This local utility account is used by an Application Center server. The server does not necessarily need to be in a cluster (that is, a server that will be used for staging). It is used for administrative work related to the server, such as writing event log information to Application Center Event and Performance Logging.
User: IUSR_ machinename	IIS uses this Windows 2000 local account to authenticate anonymous users on the Web site. This account is not used in an Application Center cluster.
User: IUSR_ controllername	This account is used by the cluster instead of the IUSR_machinename. It is replicated from the cluster controller to each new cluster member and provides a single, cluster-wide account for anonymous access.2

^{1. When another server is promoted to cluster controller the account name is not changed.}

^{2. The account name does not change when another cluster member is promoted to cluster controller. Also, if a member is removed from the cluster its IUSR_controller_name account will continue to be the anonymous access account.}

Table 4.2 describes the services that Application Center installs and launches during the set-up process.

Table 4.2 Application Center Services

Service name	Description
Application Center Administration Service	Provides internal administration support for Application Center.
Application Center Cluster Service	Allows Application Center to configure the cluster.
Application Center Log Query Helper	Provides helper functions for querying Application Center performance and event data.
Application Center Name Resolution Service	Allows Application Center to resolve computer names to IP addresses; dependent on RPC.
Application Center Synchronization Service	Used to synchronize content across the cluster; dependent on RPC.

Service Dependencies and Failures

In addition to Application Center-specific services, there are other services that the product uses. If any of these services are configured incorrectly or fail, the features that rely on them are likely to fail.

The basic configuration for each of these services, unless otherwise noted, is as follows:

• General — Startup type: Automatic
• Log on - Log on as: Local system account
• Allow service to interact with desktop: No

Table 4.3 provides information about service configuration settings that you should verify if you receive a "Misconfigured Services" error message.

Table 4.3 Troubleshooting Service Configuration

Service	Configuration information
Application Center Synchronization	On the Recovery tab, for each of the three lists, click Take No Action. In the Reset fail count after [x] days, enter 0.
Application Center Cluster	On the Recovery tab, for each of the three lists, click Restart. In the Reset fail count after [x] days box, enter 49710. In the Restart service after [x] minutes box, enter 0.
Application Center Administration	On the General tab, in the Startup type list, click Manual. On the Log On tab, click Local System account. Select the Allow service to interact with desktop check box. On the Recovery tab, for each of the three lists, click Take No Action. In the Reset fail count after [x] days box, enter 0.
Application Center Log Query Helper	On the General tab, in the Startup type list, click Manual. On the Log On tab, click Local System account. Select the Allow service to interact with desktop check box. On the Recovery tab, for each of the three lists, click Take No Action. In the Reset fail count after [x] days box, enter 0.
Application Center Name Resolution	On the Recovery tab, for each of the three lists, click Restart. In the Reset fail count after [x] days box, enter 0. In the Restart service after [x] minutes box, enter 0.
IIS Admin	On the Recovery tab, for each of the three lists, click Run a File. In the Reset fail count after [x] days box, enter 0. Under Run File, in the File box, type %System32%\Iisreset.exe, and then select the Append fail count to end of command line check box.
Remote Procedure Call	On the Recovery tab, for each of the three lists, click Take No Action. In the Reset fail count after [x] days box, enter 0.
Windows Management Instrumentation	On the Recovery tab, for each of the three lists, click Restart. In the Reset fail count after [x] days box, enter 1. In the Restart service after [x] minutes box, enter 1.
MSSQL\MSAC	On the Recovery tab, for each of the three lists, click Take No Action. In the Reset fail count after [x] days box, enter 0.
SQLAgent$MSAC	On the Recovery tab, for each of the three lists, click Take No Action. In the Reset fail count after [x] days box, enter 0.