Exchange Event ID 8026 Tools: dcdiag, netdiag, and exbpa

Tools: dcdiag, netdiag, and exbpa ( Exchange Best Practices Analyzer v2.8 (exbpa) Exchange Troubleshooting Assistant v1.1 (ExTRA) ) Event ID 8026

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Event ID 8026 - 10.May2006 7:42:21 PM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> I looked in my Event View and saw this error Event ID 8026. I have tried to research it on the internet, but there seems to be many reasons that this happens. I am pretty new with exchange 2003. Can someone help me with this error? The message was as follows: LDAP Bind was unsuccessful on directory S3a.gstassoc.com for distinguished name "Directory returned error [0x51] server down. I have two Domain Controllers and neither one is down. I have Exchange running on a standalone server. Post #: 1

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RE: Event ID 8026 - 10.May2006 8:04:07 PM tiallen Super Member Posts: 257 Joined: 26.Jan.2006 From: Minneapolis MN Status: offline >> --> Is this a random one-off error?? Are you seeing 8026's sporadically? all the time? If I were you, I would begin troubleshooting from the networks perspective... any reason exchange cannot get LDAP queries to the DCs? Are the three servers @ the same physical datacenter? on the same subnet? _____________________________ M3 PostMasters M3PostMasters@nospam.m3tg.com M3 Technology Group www.m3postmasters.com (in reply to gstassoc) Post #: 2

RE: Event ID 8026 - 10.May2006 8:20:28 PM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> No. There are a stream of them. They apply to both of my domain controllers. Is LDAP automatically setup, because I never set this up. All three servers are setup on the same subnet and are located in same office. (in reply to tiallen) Post #: 3

RE: Event ID 8026 - 10.May2006 8:44:38 PM tiallen Super Member Posts: 257 Joined: 26.Jan.2006 From: Minneapolis MN Status: offline >> --> LDAP is controlled by AD.. by default it should be working without issue... any kind of firewall on or between these systems that might be adversly affecting connectivity? _____________________________ M3 PostMasters M3PostMasters@nospam.m3tg.com M3 Technology Group www.m3postmasters.com (in reply to gstassoc) Post #: 4

RE: Event ID 8026 - 10.May2006 9:06:30 PM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> There is a firewall, but everything sits behind it. Besides this configuration was working yesterday. (in reply to tiallen) Post #: 5

RE: Event ID 8026 - 10.May2006 10:03:02 PM tiallen Super Member Posts: 257 Joined: 26.Jan.2006 From: Minneapolis MN Status: offline >> --> Run a quick tracert and nslookup on the exchange server to verify that nothing is traversing the firewall... then verify that the domain controllers are healthy... _____________________________ M3 PostMasters M3PostMasters@nospam.m3tg.com M3 Technology Group www.m3postmasters.com (in reply to gstassoc) Post #: 6

RE: Event ID 8026 - 10.May2006 11:26:08 PM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> Tim Ran a quick tracert and nslookup with no problem. I then ran dcdiag and netdiag on both domain controllers with everything passing. (in reply to tiallen) Post #: 7

RE: Event ID 8026 - 10.May2006 11:49:47 PM tiallen Super Member Posts: 257 Joined: 26.Jan.2006 From: Minneapolis MN Status: offline >> --> What if you run dcdiag & exbpa from the exchange server? How about the event logs on the domain controllers? anything out of the ordinary around the same time exchange is issuing 8026's? In server properties, why don't you cruise over to diagnostic logging and under exchange address list max the ldap logging? -Tim _____________________________ M3 PostMasters M3PostMasters@nospam.m3tg.com M3 Technology Group www.m3postmasters.com (in reply to gstassoc) Post #: 8

RE: Event ID 8026 - 11.May2006 3:24:37 AM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> Tried to run dcdiag from Exchange, but exchange could not find the app. I am not familiar with exbpa. I will google it. My domain controllers have no errors. I am not sure about your last sentence about the location of the log files. Excuse my lack of knowledge, but I am just getting familiar with Exchange. (in reply to tiallen) Post #: 9

RE: Event ID 8026 - 11.May2006 3:40:17 AM tiallen Super Member Posts: 257 Joined: 26.Jan.2006 From: Minneapolis MN Status: offline >> --> no problem, its a fun product to learn and this site is a very friendly resource for admins who are just getting used to exchange... exbpa is the exchange best practices analyzer... its a free download from microsoft and it will point out configuration errors on the exch side... For the logging, in exchange system manager, drill down to your exchang server, right click on it and select 'properties' you'll see a tab for diagnostic logging, select it, and I belive under the exchangeAL you'll see an option for LDAP queries... turn its logging level to maximum... Now exchange will log info mssgs / warnings /errors to the application log to help you diagnose this issue from the exchange side as your DCs seem to be fine... -Tim _____________________________ M3 PostMasters M3PostMasters@nospam.m3tg.com M3 Technology Group www.m3postmasters.com (in reply to gstassoc) Post #: 10

RE: Event ID 8026 - 11.May2006 7:29:35 AM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> I already had exbpa. I just didn't know it by that name. I have run it with no problems. (in reply to gstassoc) Post #: 11

RE: Event ID 8026 - 11.May2006 7:47:24 AM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> Thanks Tim. I hav e just set up logging. I'll keep you posted. Thanks again. (in reply to tiallen) Post #: 12

RE: Event ID 8026 - 14.May2006 2:30:32 PM gstassoc New Member Posts: 10 Joined: 10.May2006 Status: offline >> --> Hey Tim Sorry I did not get back to you to let you know what happen with my 8026 error issue. Well, when you told me to start logging exchangeAL something changed. I stopped getting the error message. I started out maximum logging and later switched to minimum. I can't figure out why that would stopped the error 8026, but I'll live with it. Thanks again. (in reply to tiallen) Post #: 13

RE: Event ID 8026 - 15.May2006 12:36:38 AM de.blackman Moderator Posts: 1404 Joined: 4.Apr.2005 From: Toronto, Canada Status: offline >> --> Are you domain controllers and esp. the exchange server pointing to internal DNS servers?? _____________________________ De BlackMan List Moderator "Did you backup your Information Store Today?!" (in reply to gstassoc) Post #: 14