I am having a strange issue only during business hours M-F on an exchange server to where the server goes unresponsive. I cannot RDP into it. Only way I can resolve is by Hard powering it down or I just found I can use PStools to shut down the Store and Edge transport, then i can send a psshutdown command to reboot the server. 5783 and 5719 is in event logs when this happens
Windows Domain environment:
DC is a 2008 Server Enterprise. 8GB Ram (32 Bit version)
Exchange is on a separate server running 2008 Enterprise. 8GB Ram also. It's actually the same server type. Dell PowerEdge 2950 (64 bit Version)
There is a 2003 Standard Server Running DNS and not Active directory.
No Other DC's in the Domain.
What I have Done so far:
Creted ExpectedDialupDelay Registry Key and set to 2 minutes. Saw this here. https://technet.microsoft.com/en-us/library/Cc957332.aspx
Updated NIC Drivers on the Exchange Server.
Checked all DNS settings and no reported errors. DCdiag checks out good from DC. I do not get any errors on the DC at the same times the Exchange server comes up with the 5783 and 5719 on Exchange.
Found this article, https://social.technet.microsoft.com/Forums/windowsserver/en-US/a7ac7220-8a5a-46a2-9898-9f32cdf7bdd8/netlogon-error-5783-on-exchange-server-2010-to-server-2008-r2-domain
but everything seems to check out with DNS and all the CA certificates are valid.
This started last week on 7/28/15 and has been happening daily during business hours. Mostly in the morning, but on Friday, it did happen in the late afternoon, but I did reboot the server that Friday morning before everyone got in. This weekend the event did not happen at all. Happened this morning.
After I see the 5783, 5719 events I see an event ID 7. (The digitally signed Privilege Attribute Certificate (PAC) that contains the authorization information for client <user> in realm <Domain>.LOCAL could not be validated.This error is usually caused by domain trust failures; please contact your system administrator.
I am not sure the event ID 7 is relevant, but I am running out of ideas.