Domain Controller Diagnostic Tests
List of tests and descriptions performed by the AD Health Check Tool.
- Default = 20 tests
- Comprehensive = 27 tests (takes much longer to complete)
Advertising
Checks whether each DSA is advertising itself, and whether it is advertising itself as having the capabilities of a DSA.
CheckSDRefDom
This test checks that all application directory partitions have appropriate security descriptor reference domains.
CheckSecurityError
Locates security errors (or those possibly security related) and performs the initial diagnosis of the problem. *Comprehensive only*
Connectivity
Tests whether DSAs are DNS registered, respond to ping, and have LDAP/RPC connectivity.
CrossRefValidation
This test looks for cross-refs that are in some way invalid.
CutoffServers
Check for servers that won’t receive replications because its partners are down. *Comprehensive only*
DNS
This test checks the health of DNS settings for the domain environment. *Comprehensive & DNS Only*
FrsEvent
This test checks to see if there are any operation errors in the file replication system (FRS).
DFSREvent
This test checks to see if there are any operation errors in the DFS.
SysVolCheck
This test checks that the SYSVOL is ready.
LocatorCheck FSMO Roles
Checks that global role-holders are known, can be located, and are responding.
Intersite
Checks for failures that would prevent or temporarily hold up intersite replication.
KccEvent
This test checks that the Knowledge Consistency Checker is completed without errors.
KnowsOfRoleHolders
Check whether the DSA thinks it knows the role holders, and prints these roles out in verbose mode.
MachineAccount
Check to see if the Machine Account has the proper information.
NCSecDesc
Checks that the security descriptors on the naming context heads have appropriate permissions for replication.
NetLogons
Checks that the appropriate logon privileges allow replication to proceed.
ObjectsReplicated
Check that Machine Account (AD only) and DSA objects have been replicated.
OutboundSecureChannels
Tests if there are secure channels from all the DC’s in the domain. *Comprehensive only*
Replications
Checks for timely replication between directory servers.
RidManager
Check to see if RID master is accessible and to see if it contains the proper information.
Services
Check to see if appropriate supporting services are running.
SystemLog
This test checks that the system is running without errors.
Topology
Checks that the generated topology is fully connected for all DSAs. *Comprehensive only*
VerifyEnterpriseReferences
This test verifies that certain system references are intact for the FRS and Replication infrastructure across all objects in the enterprise on each DSA. *Comprehensive only*
VerifyReferences
This test verifies that certain system references are intact for the FRS and Replication infrastructure.
VerifyReplicas
This test verifies that all application directory partitions are fully instantiated on all replica servers. *Comprehensive only*
Next Steps
In this guide, you learned about the diagnostic tests used by the Health Check Tool.
In the next guide, you will learn how to run the Health Check on your domain controllers
Test Domain Controllers