Join acs express to active directory domain

[hany_ibrahim]

i have a problem joining acs express active directory domain , both are reachable to each other in the same subnet & no firewalls between them , but when i test the connectivity it gives this error:

" required service unavailable. DNS is setup correctly , and the domain controller is reachable , however , one of the required services, such as ldap,kerberos, or global catalog service is not available. This issue may arise if there is a firewall between AD domain controller, and the ACS Express appliance"

[tstanik]

It is sounds like a bug CSCsw29387 Join AD domain, with one DC down fails. If the ACS Express is trying to join an AD domain in a multi domain controller environment and one of the domain controllers is down, the ACS Express will fail to join the domain.

[hany_ibrahim]

OK , the ACS is deployed in environment that contain several domain controllers,

& ACS will not be reachable to all of them , so is there any work around for this case