Not enough storage space is available to process this command

I am getting a constant error on my screen about storage space configuration of AD. The error is Not enough storage space is available to process this command. It appear when the users are trying to logon to Windows 2003 DC. Somehow the connectivity failed due to this. I tried to connect through RPC service on the same and getting not available error on it. How can I get rid of the problem.

I think it is due to your security application or firewall. Just check once that any security application is not blocking the connectivity. The failure can be due to this. It happened to me a time ago when due to my antivirus I got exactly the same error. As I disabled everything there is not error at all. It looks to be working fine. I am also giving you a reference link that has information on your issue.

Antivirus software may cause Event ID 2011

It looks that the error is due to insufficient storage space or some kind of memory leak. You have to reboot the DC and then check back. Ensure that there is enough ram available on the server. Go in Task Manager and check out the ram usage. If it is high then you will need to add more ram stick to provide stability to the server.