I have an Exchange 2010 / Win Srv 2008 R2 SP1 single server domain controller in a small office.
The issue I'm having is the outlook 2007 clients are rapidly connecting and disconnecting. I checked the physical hardware, switch, server's network connections and all are fine.
I am noticing this error in the application log:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=2412). 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
I'm also seeing this error:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=2412). All Domain Controller Servers in use are not responding:
Followed by this:
Process MSEXCHANGEADTOPOLOGYSERVICE.EXE (PID=2412). 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)
Those are the only errors in the event log.
I can successfully do an NSLOOKUP from the client PCs.
Any ideas why the clients are disconnecting and reconnecting to Exchange every couple of seconds?