Exchange 2010 on SBS 2011 - Event Id 2102 MSExchange ADAccess

Hi Everyone,

Exchange 2010 services will not start on our SBS2011 server. A tech was in late last night on the server to add a 2nd DNS server and setup replication from it and the SBS server and everything has gone to crap since the changes were made.

I have removed it from DNS and removed all the NS entries from both forward and reverse look-up items within DNS and disabled the replication for all of them also but issues remain. Here are the Application Log entries we see each time we try to start the services:

1) Error ID 2102 MSExchange ADAccess: Process STORE.EXE (PID=5980). All Domain Controller Servers in use are not responding: SBSserver.domain.local

2) Info ID 2080 MSExchange ADAccess: Process STORE.EXE (PID=5980). Exchange Active Directory Provider has discovered the following servers with the following characteristics:
 (Server name | Roles | Enabled | Reachability | Synchronized | GC capable | PDC | SACL right | Critical Data | Netlogon | OS Version)
In-site:
SBSserver.domain.local      CDG 1 0 0 1 0 0 0 0 0
 Out-of-site:

3) Error ID 2114 MSExchange ADAccess: Process STORE.EXE (PID=5980). Topology discovery failed, error 0x80040a02 (DSC_E_NO_SUITABLE_CDC). Look up the Lightweight Directory Access Protocol (LDAP) error code specified in the event description. To do this, use Microsoft Knowledge Base article 218185, "Microsoft LDAP Error Codes." Use the information in that article to learn more about the cause and resolution to this error. Use the Ping or PathPing command-line tools to test network connectivity to local domain controllers.

4) Error ID 2155 MSExchangeRepl: The Third Party Replication Manager could not access Active Directory. Error: The Microsoft Exchange Active Directory Topology service on server localhost did not return any suitable domain controllers.. Initialization will be retried automatically.

5) Info ID 2080 MSExchange ADAccess: Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=2112). Exchange Active Directory Provider has discovered the following servers with the following characteristics:
 (Server name | Roles | Enabled | Reachability | Synchronized | GC capable | PDC | SACL right | Critical Data | Netlogon | OS Version)
In-site:
SBSserver.domain.local      CDG 1 0 0 1 0 0 0 0 0
 Out-of-site:

6) Error ID 2114 MSExchange ADAccess: Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=2112). Topology discovery failed, error 0x80040a02 (DSC_E_NO_SUITABLE_CDC). Look up the Lightweight Directory Access Protocol (LDAP) error code specified in the event description. To do this, use Microsoft Knowledge Base article 218185, "Microsoft LDAP Error Codes." Use the information in that article to learn more about the cause and resolution to this error. Use the Ping or PathPing command-line tools to test network connectivity to local domain controllers.

7) Error ID 2102 MSExchange ADAccess: Process MAD.EXE (PID=2484). All Domain Controller Servers in use are not responding:
SBSserver.domain.local

I have run SBS BPA and it found no errors only warning about share point which we do not use on this server.

I am at a loss - downloading Exchange BPA now to try it to see if I get any further errors - any help you can provide would be appreciated.

thanks,

TheSonicOne