We recently migrated to server 2008 R2 from SBS 2003, I noticed that the original network was using a subnet mask of 255.255.0.0 but left it as it was. But now I see a post in EE that may explain the event id 4321 netbt errors that are constant. It suggests that the sM be changed to 255.255.255.0.
Here is the layout of our server configuration:
Server 2008 R2 Domain Controller: Using Hyper V on above server for two additiona servers:
Server 2008 R2 / MS Exchange 2010
Server 2008 R2 / Application Server
This error is only appearing on the Exchange Server. What is the process to change all of these servers to the new Subnet mask ? Top down? Bottom Up? Reboots required? DHCP invoved I would assume.
Thank you in advance