Hi we are running out of IP's on our network and we want to change the subnet mask to increase the available IP's on our network. We are currently running a mask of /23 and want to move to a /21. We have a flat network with no routers and using DHCP. I will like to know if by changing the mask on our network will cause any issues with AD 2003 and Exchange 2003? We are not running a exchange cluster.Thanks in advance for any assistance.

Hi Benaldo,There should be no impact to Exchange, see the following simliar post:http://social.technet.microsoft.com/forums/en-US/exchangesvrdeploy/thread/f09e107b-4abf-48f8-ba55-d67a4df97876Regarding the impact to AD, I suggest you write a post on our Windows Server forum:http://social.technet.microsoft.com/Forums/en-US/winserverPN/threadsThanks,Elvis