I have been working on this issue for a few hours now and could do with some more ideas!
Windows Server 2003 R2 - "DC01" - DC, DNS, DHCP, WINS, Global Catalog
Windows Server 2003 R2 - "EX01" - Exchange 2007, MS CRM
Windows Server 2003 R2 - "SQL01" - MS SQL 2005
Issue: Originally I noticed that the Exchange Management Console MMC wasnt working. When i start it up, it tells me that it cant find the Domain Controller.
(yet I logged in with a domain account, I can ping bot the IP and DNS name of DC01, and %logonserver% is DC01)
After some reading i found this could be caused by the system attendant not running - I checked and it wasnt. Attempting to restart it results in a failure and the event:
Event ID: 1005
Unexpected error The specified domain either does not exist or could not be contacted. Facility: Win32 ID no: c007054b Microsoft Exchange System Attendant occurred.
Microsoft Exchange System Attendant failed to start.
After some more reading I found that this could be because it cant find the Global Catalog server - so I checked and DC01 is enabled as a catalog server.
A few moments later in teh EX01 event log, the following event is logged:
Process STORE.EXE (PID=4964). 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)
DC01.headoffice.valley.local CDG 1 7 7 1 0 1 1 7 1
Looking at this, it has found a GC capable DC!
Yesterday we had a small issue with the DNS server not having any records in it - which I suspect was because of a change made to the scavanging settings last week. I have disabled scavenging and the all of the network devices have reregistered their dns entries.
So im thinking that there could be some other issue preventing the communication with the DC.
Users are still able to send and receive email - the only issue i have so far is not being able to access the MMC console for Exchange. (and wouldnt you know it - I have mailbox admin to do today!).
Only one error on the DC01 DNS event log :
The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is "". The event data contains the error.
which I have found means that DNS started before AD - therefore couldnt connect.
I have tried flushing the DNS cache and re-registering the DNS for EX01 - no change.
Any pointers or ideas would be appreciated.
Both server have been restarted (as of this morning - no change)
Thanks in advance.