Restarting Domain Controllers causing NDR's from Exchange servers
When I restart any of Domain controllers in my site, Exchange server is generating NDR's with "smtp;550 5.7.1". AFAIK, exchange 2003 should be intelligent enough to wait for a failed DC for sometime and switch over to another DC. But it is not happening in my case, when ever I reboot one DC, exchange is throwing NDR's for mails which came for processing at that time. And after few mins it is not generating NDR's for further mails. All the DCs in my site are GCs. Any one have idea why it is happening this way?I am running with Exchange 2003 SP2 with all latest patches.Thanks,Sitaram
January 5th, 2009 3:18pm

Am I alone with this problem? :-(
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January 6th, 2009 7:26am

Hi, Please ensure the Exchange Server is configured to automatically discover servers: ESM->AG->Server->Properties->Directory Access tab->Select Global Catalog servers/Domain Controllers/Configuration Domain Controller. In addition, please post the entire NDR message and code you received here for further information. Mike
January 6th, 2009 11:57am

I don't have complete NDR message now, but the return code is "smtp;550 5.7.1". I will try to get the complete NDRs also(need to dig my old mails.)Thanks,Sitaram
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January 6th, 2009 2:15pm

I came across this article and I guess this is true in my case. http://support.microsoft.com/default.aspx/kb/950757/en-us
May 21st, 2009 5:24pm

HI,Please enable exchange debug logging for MSExchangeDSaccess which may give some reason for NDR's.ThanksSachin
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May 21st, 2009 5:59pm

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