Get-ADReplicationFailure and Get-ADReplicationUpToDatenessVectorTable

Question

Hi,
Where does the Get-ADReplicationFailure and Get-ADReplicationUpToDatenessVectorTable cmdlets retrieve it`s data from?
Lets start with Get-ADReplicationFailure: It shows 2 replication failures which is not current. Running the following in the same environment shows no errors:
$dclist= get-addomaincontroller-filter *
foreach($dc in$dclist) {
repadmin /showrepl /csv | ConvertFrom-Csv
Get-ADReplicationUpToDatenessVectorTable: This cmdlet returns a lot of Microsoft.ActiveDirectory.Management.ADReplicationUpToDatenessVectorTable objects. Many of them have old timestamps and
 no value for the Partner property:
LastReplicationSuccess : 26.04.2010 21:01:02
Partition              : DC=domain,DC=local
PartitionGuid          : 7ddec540-31db-44d3-9ab5-d5adb479627e
Partner                :
PartnerInvocationId    : 0e2fbc85-8d50-4c30-ae65-27648a0888b9
Server                 : dc01.domain.local
UsnFilter              : 19853
These are probably old domain controllers which is decomissioned years ago. Why does these show up? And where is the cmdlet getting this data from?
The replication topology seems healthy using the legacy tools, but the new cmdlets isn`t giving the same impression.
Some clarifications would be appreciated.

Answer 1

Hi scripter42,
The Get-ADReplicationFailure cmdlet returns all failures currently associated with a given domain controller or Active Directory Lightweight Directory Services (AD LDS) instance. The return object is of type ADReplicationFailure. This cmdlet returns the
list of failures in the ADReplicationSummary object for a specific server.
The ADReplicationUpToDatenessVectorTable displays the highest Update Sequence Number (USN) for the specified domain controller(s). This information shows how up-to-date a replica is with its replication partners.
Regards,
Lany Zhang