Troubleshooting ForestPrep Failure

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Sample DCDIAG

C:\Support Tools>dcdiag /s:firstdc

Domain Controller Diagnosis

Performing initial setup:

   Done gathering initial info.

Doing initial required tests

   Testing server: Default-First-Site-Name\FIRSTDC

      Starting test: Connectivity

         The host 35b7169d-a567-45fbe-8e77-b3f6ef46501a._msdcs.example.com could not be resolved to an

         IP address.  Check the DNS server, DHCP, server name, etc

         ......................... FIRSTDC failed test Connectivity

Doing primary tests

   Testing server: Default-First-Site-Name\FIRSTDC

      Skipping all tests, because server FIRSTDC is not responding to directory service requests

   Running partition tests on : ForestDnsZones

      Starting test: CrossRefValidation

         ......................... ForestDnsZones passed test CrossRefValidation

      Starting test: CheckSDRefDom

         ......................... ForestDnsZones passed test CheckSDRefDom

   Running partition tests on : DomainDnsZones

      Starting test: CrossRefValidation

         ......................... DomainDnsZones passed test CrossRefValidation

      Starting test: CheckSDRefDom

         ......................... DomainDnsZones passed test CheckSDRefDom

   Running partition tests on : Schema

      Starting test: CrossRefValidation

         ......................... Schema passed test CrossRefValidation

      Starting test: CheckSDRefDom

         ......................... Schema passed test CheckSDRefDom

   Running partition tests on : Configuration

      Starting test: CrossRefValidation

         ......................... Configuration passed test CrossRefValidation

      Starting test: CheckSDRefDom

         ......................... Configuration passed test CheckSDRefDom

   Running partition tests on : example

      Starting test: CrossRefValidation

         ......................... example passed test CrossRefValidation

      Starting test: CheckSDRefDom

         ......................... example passed test CheckSDRefDom

   Running enterprise tests on : example.com

      Starting test: Intersite

         ......................... example.com passed test Intersite

      Starting test: FsmoCheck

         ......................... example.com passed test FsmoCheck

C:\Support Tools>

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Event ID 2092 Description

This server is the owner of the following FSMO role, but does not consider it valid. For the partition which contains the FSMO, this server has not replicated successfully with any of its partners since this server has been restarted. Replication errors are preventing validation of this role.

Operations which require contacting a FSMO operation master will fail until this condition is corrected.

FSMO Role: CN=Infrastructure,DC=tbcs,DC=local

User Action:

1. Initial synchronization is the first early replications done by a system as it is starting. A failure to initially synchronize may explain why a FSMO role cannot be validated. This process is explained in KB article 305476.

2. This server has one or more replication partners, and replication is failing for all of these partners. Use the command repadmin /showrepl to display the replication errors.  Correct the error in question. For example there maybe problems with IP connectivity, DNS name resolution, or security authentication that are preventing successful replication.

3. In the rare event that all replication partners being down is an expected occurance, perhaps because of maintenance or a disaster recovery, you can force the role to be validated. This can be done by using NTDSUTIL.EXE to seize the role to the same server. This may be done using the steps provided in KB articles 255504 and 324801 on http://support.microsoft.com.

The following operations may be impacted:

Schema: You will no longer be able to modify the schema for this forest.

Domain Naming: You will no longer be able to add or remove domains from this forest.

PDC: You will no longer be able to perform primary domain controller operations, such as Group Policy updates and password resets for non-Active Directory accounts.

RID: You will not be able to allocation new security identifiers for new user accounts, computer accounts or security groups.

Infrastructure: Cross-domain name references, such as universal group memberships, will not be updated properly if their target object is moved or renamed. 

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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