Re: Using Exchange2003 when the PDC is offline
From: Dave Kearney [MSFT] (dkearney_at_online.microsoft.com)
Date: 11/30/04
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Date: Mon, 29 Nov 2004 21:27:58 -0800
You should be able to survive for a while without your PDC emulator online.
That said, I'm assuming we're talking about Active Directory here. In that
case, you're going to be heavily dependant on DNS. I'd probably start by
checking your DNS resolution infrastructure. What server is your Exchange
server and clients configured to use as primary DNS? Is there a backup? In
the absence of DNS resolution, you're going to have big trouble.
That said, despite the work the Exchange team has done on improving its
ability to survive DC outages, there is still a possibility that you may
have service availability issues if the DC it has decided to associate
itself with unexpectedly dies. In that case, you might need to reboot the
Exchange server so that it will associate itself with an available DNS
server. Again, this will require successful DNS resolution.
-- -Dave This posting is provided "AS IS" with no warranties, and confers no rights. Use of included script samples are subject to the terms specified at http://www.microsoft.com/info/cpyright.htm. "Mark Walsh" <Mark Walsh@discussions.microsoft.com> wrote in message news:DF69B7D6-D18E-483D-9FF9-ABD6307C8E8B@microsoft.com... > Our PDC went belly up with a RAID controller failure. The full restore of > the server from tape takes about 8 hours and is still underway. > > However, as soon as the PDC is taken off-line, for any reason, no one can > connect to the Exchange server, which is also a BDC, using Outlook. Plus, > OWA also refuses to play while the PDC is off-line. It just keeps coming > ups > with authentication errors, as well as LDAP errors. Once the PDC is back > on > line, these errors go away and the exchange server will start working > again. > > Now I was of the understanding that a BDC could handle authentication if > the > PDC was off-line. > > Or is it the case that having a single server fail, if it is the PDC, then > all the rest of the servers are inaccessible. > > Is this normal behaviour? Not being able to use the Exchange server > because > the PDC is off-line. Doesn't that also make us very vulnerable with all > our > servers being at the mercy of a single server? The SQL server is they > same, > can't authenticate. And it too is a BDC. What have I done wrong? > >
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