I've installed a new 2008R2 DC, planning to replace and old 2003 server (with the same name and IP). When I go to demote the old unit, it claims it's the last DC. I've gone through DNS line by line, and both servers are identical in everyway and they both include both servernames in the various entries. An ipcofig/all on either machine only shows the original server for DNS. I don't hace DHCP running onthe new server yet. If I try to add the new server, I can find it in AD, but when I select it, it says "the server you specified cannot be located". Might be related? I did do a ipconfig /registerdns onthe new machine based on another thread. Any ideas? I'm not a real IT guy, so don't assume anything!

I noticed my adapter setting pointed to just the old DNS, so I changed the settings on both to include both servers. ipconfig/all not does show both servers for DNS, but same problem exists with trying to demote.

Just to be sure, each DC has its own IP address, right? Validate replication On any DC run: repadmin /syncall <DCNAME> then verify replication with repadmin /replsum <DCNAME> Replace <DCNAME> with the name of each DC. The results should be successful. if results aren't successful run repadmin /kcc <DCNAME> and repeat. Also make sure the appropriate ports are open on each DC. This is basic replication troubleshooting. Also check the event viewer and post any relevant errors here.

Both DCs say "The RPC server is unavailable" to the /syncall function. Both /kcc's say "Consistency check on <> successful."

I started the RPCLocator service on both controllers (was "manual" and off). No change to RPC server unavailable.

Here's my DCDIAG /TEST:DNS report. I removed much of it that passed or was omitted to get the post size down to the maximum. 123.2 is my old (working) server 123.12 is my new server It looks like there's a lot wrong. I followed the articles on migration pretty carefully, I thought. --------------------------- Directory Server Diagnosis Performing initial setup: Doing initial required tests Testing server: Default-First-Site-Name\CCFP-SERVER Starting test: Connectivity * Active Directory LDAP Services Check Determining IP4 connectivity * Active Directory RPC Services Check ......................... CCFP-SERVER passed test Connectivity Doing primary tests Testing server: Default-First-Site-Name\CCFP-SERVER Starting test: DNS ......................... CCFP-SERVER passed test DNS Starting test: DNS Test results for domain controllers: DC: ccfp-server.clearcreek.domain Domain: clearcreek.domain TEST: Authentication (Auth) Authentication test: Successfully completed TEST: Basic (Basc) The OS Microsoft(R) Windows(R) Server 2003 Standard x64 Edition (Service Pack level: 2.0) is supported. NETLOGON service is running kdc service is running DNSCACHE service is running DNS service is running DC is a DNS server Network adapters information: Adapter [00000007] Broadcom NetXtreme Gigabit Ethernet: MAC address is 00:E0:81:40:C6:5A IP Address is static IP address: 192.168.123.2 DNS servers: 192.168.123.2 (ccfp-server.clearcreek.domain.) [Valid] Warning: 192.168.123.12 (CCFP-SERVER-T) [Invalid] Warning: adapter [00000007] Broadcom NetXtreme Gigabit Ethernet has invalid DNS server: 192.168.123.12 (CCFP-SERVER-T) The A host record(s) for this DC was found The SOA record for the Active Directory zone was found The Active Directory zone on this DC/DNS server was found primary Root zone on this DC/DNS server was not found TEST: Dynamic update (Dyn) Warning: Failed to add the test record dcdiag-test-record in zone clearcreek.domain [Error details: 9003 (Type: Win32 - Description: DNS name does not exist.)] Test record dcdiag-test-record deleted successfully in zone clearcreek.domain TEST: Records registration (RReg) Network Adapter [00000007] Broadcom NetXtreme Gigabit Ethernet: Matching CNAME record found at DNS server 192.168.123.2: fe41348a-50f0-46b7-b8e3-d7e832a6cff4._msdcs.clearcreek.domain Matching A record found at DNS server 192.168.123.2: ccfp-server.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.825eff77-9e8d-4851-8938-6db35d049758.domains._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._udp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kpasswd._tcp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.Default-First-Site-Name._sites.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.Default-First-Site-Name._sites.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.Default-First-Site-Name._sites.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.gc._msdcs.clearcreek.domain Matching A record found at DNS server 192.168.123.2: gc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _gc._tcp.Default-First-Site-Name._sites.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.Default-First-Site-Name._sites.gc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.pdc._msdcs.clearcreek.domain Warning: Missing CNAME record at DNS server 192.168.123.12: fe41348a-50f0-46b7-b8e3-d7e832a6cff4._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Warning: Missing A record at DNS server 192.168.123.12: ccfp-server.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.825eff77-9e8d-4851-8938-6db35d049758.domains._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kerberos._tcp.dc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.dc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kerberos._tcp.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kerberos._udp.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kpasswd._tcp.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.Default-First-Site-Name._sites.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.Default-First-Site-Name._sites.dc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kerberos._tcp.Default-First-Site-Name._sites.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.gc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Warning: Missing A record at DNS server 192.168.123.12: gc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _gc._tcp.Default-First-Site-Name._sites.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.Default-First-Site-Name._sites.gc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.pdc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Record registrations cannot be found for all the network adapters Summary of test results for DNS servers used by the above domain controllers: DNS server: 192.168.123.12 (CCFP-SERVER-T) 1 test failure on this DNS server Name resolution is not functional. _ldap._tcp.clearcreek.domain. failed on the DNS server 192.168.123.12 [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] DNS server: 192.168.123.2 (ccfp-server.clearcreek.domain.) All tests passed on this DNS server Name resolution is functional._ldap._tcp SRV record for the forest root domain is registered DNS delegation for the domain _msdcs.clearcreek.domain. is operational on IP 192.168.123.2 Summary of DNS test results: Auth Basc Forw Del Dyn RReg Ext _________________________________________________________________ Domain: clearcreek.domain ccfp-server PASS WARN PASS PASS WARN FAIL n/a ......................... clearcreek.domain failed test DNS Test omitted by user request: LocatorCheck Test omitted by user request: Intersite Directory Server Diagnosis Performing initial setup: * Connecting to directory service on server ccfp-server-t. * Identified AD Forest. Collecting AD specific global data * Collecting site info. Calling ldap_search_init_page(hld,CN=Sites,CN=Configuration,DC=clearcreek,DC=domain,LDAP_SCOPE_SUBTREE,(objectCategory=ntDSSiteSettings),....... The previous call succeeded Iterating through the sites Looking at base site object: CN=NTDS Site Settings,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=clearcreek,DC=domain Getting ISTG and options for the site * Identifying all servers. Calling ldap_search_init_page(hld,CN=Sites,CN=Configuration,DC=clearcreek,DC=domain,LDAP_SCOPE_SUBTREE,(objectClass=ntDSDsa),....... The previous call succeeded.... The previous call succeeded Iterating through the list of servers Getting information for the server CN=NTDS Settings,CN=CCFP-SERVER,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=clearcreek,DC=domain objectGuid obtained InvocationID obtained dnsHostname obtained site info obtained All the info for the server collected Getting information for the server CN=NTDS Settings,CN=CCFP-SERVER-T,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=clearcreek,DC=domain objectGuid obtained InvocationID obtained dnsHostname obtained site info obtained All the info for the server collected * Identifying all NC cross-refs. * Found 2 DC(s). Testing 1 of them. Done gathering initial info. Doing initial required tests Testing server: Default-First-Site-Name\CCFP-SERVER-T Starting test: Connectivity * Active Directory LDAP Services Check The host 69099c64-cdaf-423d-b141-d89c85889f19._msdcs.clearcreek.domain could not be resolved to an IP address. Check the DNS server, DHCP, server name, etc. Got error while checking LDAP and RPC connectivity. Please check your firewall settings. ......................... CCFP-SERVER-T failed test Connectivity Doing primary tests Starting test: DNS Test results for domain controllers: DC: ccfp-server-t.clearcreek.domain Domain: clearcreek.domain TEST: Authentication (Auth) Authentication test: Successfully completed TEST: Basic (Basc) Error: No LDAP connectivity The OS Microsoft Windows Server 2008 R2 Standard (Service Pack level: 1.0) is supported. NETLOGON service is running kdc service is running DNSCACHE service is running DNS service is running DC is a DNS server Network adapters information: Adapter [00000007] Intel(R) I350 Gigabit Network Connection: MAC address is 00:25:90:9A:4C:CE IP Address is static IP address: 192.168.123.12, fe80::58b5:2122:ebe9:43e7 DNS servers: 192.168.123.2 (ccfp-server.clearcreek.domain.) [Valid] Warning: 192.168.123.12 (CCFP-SERVER-T) [Invalid] Warning: adapter [00000007] Intel(R) I350 Gigabit Network Connection has invalid DNS server: 192.168.123.12 (CCFP-SERVER-T) Warning: 127.0.0.1 (CCFP-SERVER-T) [Invalid] Warning: adapter [00000007] Intel(R) I350 Gigabit Network Connection has invalid DNS server: 127.0.0.1 (CCFP-SERVER-T) No host records (A or AAAA) were found for this DC The SOA record for the Active Directory zone was found The Active Directory zone on this DC/DNS server was found primary Root zone on this DC/DNS server was not found TEST: Dynamic update (Dyn) Warning: Failed to add the test record dcdiag-test-record in zone clearcreek.domain [Error details: 9003 (Type: Win32 - Description: DNS name does not exist.)] Test record dcdiag-test-record deleted successfully in zone clearcreek.domain TEST: Records registration (RReg) Network Adapter [00000007] Intel(R) I350 Gigabit Network Connection: Matching CNAME record found at DNS server 192.168.123.2: 69099c64-cdaf-423d-b141-d89c85889f19._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.825eff77-9e8d-4851-8938-6db35d049758.domains._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._udp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kpasswd._tcp.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.Default-First-Site-Name._sites.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.Default-First-Site-Name._sites.dc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _kerberos._tcp.Default-First-Site-Name._sites.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.gc._msdcs.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _gc._tcp.Default-First-Site-Name._sites.clearcreek.domain Matching SRV record found at DNS server 192.168.123.2: _ldap._tcp.Default-First-Site-Name._sites.gc._msdcs.clearcreek.domain Warning: Missing CNAME record at DNS server 192.168.123.12: 69099c64-cdaf-423d-b141-d89c85889f19._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.825eff77-9e8d-4851-8938-6db35d049758.domains._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kerberos._tcp.dc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _ldap._tcp.dc._msdcs.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Error: Missing SRV record at DNS server 192.168.123.12: _kerberos._tcp.clearcreek.domain [Error details: 10054 (Type: Win32 - Description: An existing connection was forcibly closed by the remote host.)] Summary of DNS test results: Auth Basc Forw Del Dyn RReg Ext _________________________________________________________________ Domain: clearcreek.domain ccfp-server-t PASS FAIL PASS PASS WARN FAIL n/a ......................... clearcreek.domain failed test DNS Test omitted by user request: LocatorCheck Test omitted by user request: Intersite

Troubleshooting "The RPC server is unavailable" http://social.technet.microsoft.com/wiki/contents/articles/4494.troubleshooting-the-rpc-server-is-unavailable.aspx Also, Is the time and date on each server the same? On the server with the 192.168.123.12 ip address on the network adapter disable ipv6 then do an ipconfig /registerdns and net stop netlogon && net start netlogon.

Did those things with no change in the DCDIAG. (I started a new thread with a better title when I realized the problem was braoder than this one). Hope that wasn't inapproprite. You might want to help there, instead?