NetLogon Error 5719

[Rippley]

I am currently running in a 2003 Domain. I have two GC servers and an Exchange 2003 Server within my site. There are 3 sites in the domain all connected via VPN. All the FSMO rolls exist in a site which we connect to via VPN through a firewall.

I keep getting Netlogon errors on my exchange server, and I have exhausted KB to no avail.
Does anyone have any idea as to why I would get this error on my server when it has direct access to two GC on the same network?

Event ID 5719

This computer was not able to set up a secure session with a domain controller in domain DOMAINNAME due to the following:
The RPC server is unavailable.
This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator.

ADDITIONAL INFO
If this computer is a domain controller for the specified domain, it sets up the secure session to the primary domain controller emulator in the specified domain. Otherwise, this computer sets up the secure session to any domain controller in the specified domain.

 

[ChicagoTechNet]

quoted form

http://www.chicagotech.net/

Event ID 5719 - The system cannot log you on now because the domain "name" is not available."
Symptoms: when attempting to logon a domain, you keep getting an error that "The system cannot log you on now because the domain "name" is not available." Also, Event viewer shows Event ID: 5719. No Windows NT or Windows 2000 Domain Controller is available for domain <domain name>. The following error occurred: There are currently no logon servers available to service the logon request.

Resolutions: One possible cause of this error is that you have run out of buffer space in the NetBT datagram buffer. To resolve this problem, increase the MaxDgramBuffering value from 128 KB to 256 KB. Run Regedt32.exe, go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NetBT\Parameters. On the Edit menu, click Add Value, and then add the following information:

Value Name: MaxDgramBuffering
Data Type: REG_DWORD
Value: 0x40000


Robert Lin, MS-MVP, MCSE & CNE
Windows, Network, Internet, VPN, Routing and How to at

http://www.ms-mvps.com

 

[Rippley]

Thanks for the suggestion but we have already added the key and it made no difference.