I have a very long winded situation here so let me just start by saying that I am new to the company as Network Administrator.
Currently staffed are another Desktop Admin, and IT Manager - There is absolutely no communication in this team.
We have the following implementation:
Head Office is ServerDC and ServerDC1 - both 2003 Running Exchange 2007.
ServerDC is the Operations,RID, Schema Master, DHCP, DNS etc.
Also we have DFS running for data availability and replication
We have 10 Remote site locations which do not have their own internet connection. They connect via an MPLS and out to the internet.
Yesterday out of the blue, no on can access file shares: The "fileserver" which is the host of the namespace locks up. I did the necessary testing then decided to reboot the server. Once the server restarted, NO One could get any of the mapped drives, or DFS data.
The file server was giving errors in Event Viewer that the local drive G and H have been deleted or disabled.
While im looking into this, one of my co-workers reboots ServerDC.
After that reboot, no one could log in!!
I found that on ServerDC1 the NETLOGIN service was stuck "starting". Once i restarted it everything was back online.
BUT now I have all sorts of errors:
1. User machines showing up in DC event logs - Security Database rejected
2. Autoenrollment from all Site office Domain Controllers
3. Warnings about FRS not being able to resolve DNS names.
4. The DNS server encountered an invalid domain name in a packet from x.x.x.x.
I decided to run the command Set Logonserver to see what server a few users are authenticating against. Its a split - either DC or DC1 is this normal??
5. The session setup from computer 'username' failed because the security database does not contain a trust account 'user$' referenced by the specified computer.
Thank god Exchange was not at all interrupted or errors!
This is a mess!