I wrote a pretty good explaination of the issues with VPN and
Outlook/Exchange a number of months ago - its somewhere in the archives.

In a nutshell, the problem is MTU size - VPN's eat a portion of the MTU for
the encapsulation overhead, and many times, data is sent with the "Do Not
Fragment" bit set. The end result is any packet over about 1kb gets
rejected.

------------------------------------------------------
Roger D. Seielstad - MCSE MCT
Senior Systems Administrator
Peregrine Systems
Atlanta, GA
http://www.peregrine.com


> -----Original Message-----
> From: Niki Blowfield [mailto:[EMAIL PROTECTED]]
> Sent: Monday, November 26, 2001 10:02 AM
> To: Exchange Discussions
> Subject: RE: Setup error : Check Knowledge Consistency *SOLVED*
> 
> 
> After running Netmon it would appear that the problem is with 
> the VPN config
> 
> Thanks all for the help
> 
> -----Original Message-----
> From: Missy Koslosky [mailto:[EMAIL PROTECTED]] 
> Sent: 26 November 2001 13:48
> To: Exchange Discussions
> Subject: Re: Setup error : Check Knowledge Consistency
> 
> 
> A netmon trace to see what the server that is being installed 
> is trying to
> do over the network would help you sort out exactly where 
> this is failing.
> 
> I'm pointing to the VPN as the problem because it has seemed 
> to me that most
> installation issues are actually network problems.
> 
> Missy
> ----- Original Message -----
> From: "Niki Blowfield" <[EMAIL PROTECTED]>
> To: "Exchange Discussions" <[EMAIL PROTECTED]>
> Sent: Monday, November 26, 2001 3:35 AM
> Subject: RE: Setup error : Check Knowledge Consistency
> 
> 
> Any ideas what specifically to look for? Everything else 
> seems to be working
> okay.
> 
> It's a Sonicwall VPN
> 
> -----Original Message-----
> From: Missy Koslosky [mailto:[EMAIL PROTECTED]]
> Sent: 24 November 2001 18:14
> To: Exchange Discussions
> Subject: Re: Setup error : Check Knowledge Consistency
> 
> 
> I'd bet that the VPN is causing the errors.
> 
> Missy
> ----- Original Message -----
> From: "Niki Blowfield" <[EMAIL PROTECTED]>
> To: "Exchange Discussions" <[EMAIL PROTECTED]>
> Sent: Friday, November 23, 2001 11:37 AM
> Subject: Setup error : Check Knowledge Consistency
> 
> 
> Dear All,
> 
> When attempting to add a server to our Site, setup always 
> fails at the same
> point (some replication items were not completed) and this 
> error appears in
> the Event Viewer.
> 
> Event Type: Warning
> Event Source: MSExchangeSetup
> Event Category: Replication Configuration
> Event ID: 2015
> Date: 23/11/2001
> Time: 09:27:10
> User: N/A
> Computer: NEWEXCHSERV
> Description:
> An error occurred while preparing to update the replica of 
> naming context
> '/o=Our Company Name/ou=OURDOMAIN/cn=Configuration' on server 
> 'NEWEXCHSERV'.
> The replica will be updated on server 'NEWEXCHSERV' during 
> the course of any
> normal replication updates. <<0xc1030b1c - There is currently 
> no consistency
> between directories. On the DSA General property page, choose Check
> Knowledge Consistency.>>
> 
> Setup is 4 servers connected via VPN, all Exchange 5.5, 2 
> SP3, 2 no sp's
> applied, have checked name res between servers, seems fine, 
> have used Check
> Knowledge Consistency until no errors are reported on all servers,
> re-installed, and got same error. Subsequentley, none of the 
> new services on
> the new server start 'cannot find file'
> 
> Any advice appreciated
> 
> Nik
> 
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