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Checks that all application directory partitions are fully instantiated on all replica servers. |
/RecreateMachineAccount |
/FixMachineAccount |
/objectdn:dn |
/n:nc |
/testdomain |
/nositerestriction |
Note |
Connectivity checks on domain controllers that are registered on the network and connect with other resources like DNS, LDAP, and RPC cannot be skipped. |
DNS test syntax |
dcdiag /test:DNS [/DnsBasic | /DnsForwarders | /DnsDelegation | /DnsDynamicUpdate | /DnsRecordRegistration | /DnsResolveExtName [/DnsInternetName:<InternetName>] | /DnsAll] [/f:<LogFile>] [/x:<XMLLog.xml>] [/xsl:<XSLFile.xsl> or <XSLTFile.xslt>] [/s:<DomainController>] [/e] [/v] |
dcdiag /test:DNS [/DnsBasic | /DnsForwarders | /DnsDelegation | /DnsDynamicUpdate | /DnsRecordRegistration | /DnsResolveExtName [/DnsInternetName:<InternetName>] | /DnsAll] [/f:<LogFile>] [/x:<XMLLog.xml>] [/xsl:<XSLFile.xsl> or <XSLTFile.xslt>] [/s:<DomainController>] [/e] [/v] |
DNS test uses the following parameters: |
Parameter |
Description |
/test:DNS |
Performs the specified DNS test. If no test is specified, defaults to /DnsAll. |
/DnsBasic |
Performs basic DNS tests, including network connectivity, DNS client configuration, service availability, and zone existence. |
/DnsForwarders |
Performs the /DnsBasic tests and also checks the configuration of forwarders. |
/DnsDelegation |
Performs the /DnsBasic tests and also checks for proper delegations. |
/DnsDynamicUpdate |
Performs /DnsBasic tests and also determines if dynamic update is enabled in the Active Directory zone. |
/DnsRecordRegistration |
Performs the /DnsBasic tests, and also checks if the address (A), canonical name (CNAME) and well-known service (SRV) resource records are registered. In addition, creates an inventory report based on the test results. |
/DnsResolveExtName [/DnsInternetName:\<InternetName>] |
Performs the /DnsBasic tests, and also attempts to resolve InternetName. If /DnsInternetName isn't specified, attempts to resolve the name www.microsoft.com. If /DnsInternetName is specified, attempts to resolve the Internet name supplied by the user. |
/DnsAll |
Performs all tests, except for the /DnsResolveExtName test, and generates a report. |
/f:<LogFile> |
Redirects all output to a log file. |
/s:<DomainController> |
Runs the tests against the domain controller. If this parameter isn't specified, the tests are run against the local domain controller. |
/e |
Runs all tests specified by /test:DNS against all domain controllers in the Active Directory forest. |
/v |
Verbose. Presents extended information about successful test results in addition to information about errors and warnings.When the /v parameter isn't used, provides only error and warning information. Use the /v switch when errors or warnings are reported in the summary table. |
/x:<XMLLog.xml> |
Redirects all output to xmllog.xml. This parameter works only with the /test:DNS option. |
/xsl:<XSLFile.xsl> or /xsl:<XSLTFile.xslt> |
Adds the processing instructions that reference the specified sheet. This parameter only works with the /test:DNS /x:<XMLLog.xml option. |
/DnsAll |
/DnsBasic |
/DnsBasic |
/DnsBasic |
/DnsBasic |
<InternetName> |
/DnsBasic |
/DnsInternetName |
/DnsInternetName |
/DnsResolveExtName |
<LogFile> |
<DomainController> |
/test:DNS |
/v |
/v |
<XMLLog.xml> |
/test:DNS |
<XSLFile.xsl> |
<XSLTFile.xslt> |
/test:DNS /x:<XMLLog.xml |
Note |
Run times for DNS tests can be significant in large enterprises when the /e parameter is used. Domain controllers and DNS servers that are offline will increase run times due to long time-out periods for RPC and other protocols. |
/e |
Examples |
Connectivity test |
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