Failed to install Exchange 2016 CU20

Question

Error:
The following error was generated when "$error.Clear();
install-AdministrativeGroup -DomainController $RoleDomainController

" was run: "Microsoft.Exchange.Data.Directory.ADObjectAlreadyExistsException: Active Directory operation failed on WCL-DC01.DOMAIN.local. The object 'CN=Folder Hierarchies,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=DOMAIN Construction Ltd,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DOMAIN,DC=local' already exists. ---> System.DirectoryServices.Protocols.DirectoryOperationException: The object exists.
at System.DirectoryServices.Protocols.LdapConnection.ConstructResponse(Int32 messageId, LdapOperation operation, ResultAll resultType, TimeSpan requestTimeOut, Boolean exceptionOnTimeOut)
at System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request, TimeSpan requestTimeout)
at Microsoft.Exchange.Data.Directory.GuardedDirectoryExecution.ExecuteT
at Microsoft.Exchange.Data.Directory.PooledLdapConnection.GuardedSendRequest(String forestName, GuardedDirectoryExecution guardedDirectoryExecution, DirectoryRequest request, TimeSpan timeout, Func3 sendRequestDelegate, Int64& concurrency) at Microsoft.Exchange.Data.Directory.PooledLdapConnection.SendRequest(DirectoryRequest request, LdapOperation ldapOperation, Nullable1 clientSideSearchTimeout, IADLogContext logContext, Boolean shouldLogLastFilter)
at Microsoft.Exchange.Data.Directory.ADDataSession.ExecuteModificationRequest(ADObject entry, DirectoryRequest request, ADObjectId originalId, Boolean emptyObjectSessionOnException, Boolean isSync)
--- End of inner exception stack trace ---
at Microsoft.Exchange.Data.Directory.ADDataSession.AnalyzeDirectoryError(PooledLdapConnection connection, DirectoryRequest request, DirectoryException de, Int32 totalRetries, Int32 retriesOnServer, String callerFilePath, Int32 callerFileLine, String memberName)
at Microsoft.Exchange.Data.Directory.ADDataSession.ExecuteModificationRequest(ADObject entry, DirectoryRequest request, ADObjectId originalId, Boolean emptyObjectSessionOnException, Boolean isSync)
at Microsoft.Exchange.Data.Directory.ADDataSession.Save(ADObject instanceToSave, IEnumerable`1 properties, Boolean bypassValidation)
at Microsoft.Exchange.Data.Directory.SystemConfiguration.ADConfigurationSession.Save(ADConfigurationObject instanceToSave, String callerFilePath, Int32 callerFileLine, String memberName)
at Microsoft.Exchange.Management.Deployment.InstallAdministrativeGroup.InstallConfigurationObjectTObject
at Microsoft.Exchange.Management.Deployment.InstallAdministrativeGroup.InternalProcessRecord()
at Microsoft.Exchange.Configuration.Tasks.Task.<ProcessRecord>b__91_1()
at Microsoft.Exchange.Configuration.Tasks.Task.InvokeRetryableFunc(String funcName, Action func, Boolean terminatePipelineIfFailed)".

Can anyone tell me what this error means and how to get past it?

CU20 update fails on Exchange 2016 Server on step 1

Answer 1

Old issue, see;

https://learn.microsoft.com/en-us/archive/blogs/manjubn/1-exchange-server-2013-preparead-or-cumultive-update-installation-fails

Answer 2

resolved by following this

https://blog.expta.com/2013/04/active-directory-operation-failed.html