An error occurred while checking server in site. Error: The specified string parameter is empty. Parameter name: name (4317562)

Replication Monitor test may fail with errors similar to the following:

"The specified string parameter is empty. Parameter name: name. Replication Analyzer fails with error: Property 'dnsHostName' not found"

OR

"An error occurred while checking server in site <SiteName>. Error: The specified string parameter is empty. Parameter name: name. The following domain controllers failed the replication test"

OR

"An error occurred while attempting to get the site servers. An error occurred while attempting to load properties for the server ServerName"

Riverbed Steelhead devices were joined to the domain and appear in (AD) Active Directory Sites and Services and (RODC) Read only domain controllers, decommissioned DCs are still listed in AD Sites and Services, or the DCs are not reachable.

To exclude machines from Replication Monitoring:

1. Launch the Active Administrator console
2. Expand "Active Directory Infrastructure"
3. Select "Replication Monitoring"
4. Highlight the Forest name
5. Select "Edit Forest"
6. Exclude any unreachable Domain controllers or Riverbed devices from the list