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After installing High Encryption pack, clients can't connect

Posted on 2005-04-20
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Last Modified: 2008-01-09
I installed the W2k High Encryption Pack on our Exchange 2000 server because I'm going to need it to allow Linux clients to authenticate to the AD.  Since I installed the pack, clients using IMAPS can't check their mail (IMAP works fine).  Thunderbird fails with a generic "Unable to connect to your IMAP server" message. Outlook Express also fails and gives the following info:

   Protocol: IMAP
   Port: 993
   Secure(SSL): 1
   Code: 800ccc0f

In the properties for the IMAP virtual server, "require secure channel" is not selected.

OWA+SSL seems to be working fine, though I have a report from our sole Evolution user that Evolution is no longer working for him (and Evolution uses OWA to access Exchange, as I recall).  "Require secure channel" isn't selected in IIS either.

What can I do to fix this (bseides uninstalling the High Encryption Pack, since I need it)?
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Question by:mnuss
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by:RevelationCS
ID: 13826444
the high encryption pack typically is for the OS and upgrades the encryption to the 128 bit encryption that is common now... possible that the clients/OS that the users are using to connect to OWA is not 128 bit compatible? might want to look at this as a possible source of the problem...
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by:mnuss
ID: 13827185
I don't think so. I am using Windows XP with IE/OE6. This should support 128-bit encryption. OWA works fine; Outlook Express does not.
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by:RevelationCS
ID: 13828283
do you have the latest service packs for exchange?
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by:mnuss
ID: 13828793
I believe so (Version 6.0 Build 6249.4 Service Pack 3)

Here's a question. Can I get rid of high encryption, maybe by reapplying one of the Windows service packs? At this point, it would be nice to just have things working the way they were.
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by:RevelationCS
ID: 13828938
should be able to go into add/remove programs and uninstall the encryption pack... might want to just doublecheck and make sure you have all of the recommended updates for exchange also...
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by:mnuss
ID: 13830507
No, it's not in the list and Microsoft explicitly says it can't be uninstalled, which is why I was wondering if there was a workaround.

However... somehow, rebooting the server seems to have fixed things.
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Expert Comment

by:RevelationCS
ID: 13835566
no objections....
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