Outlook 2007 connecting toExchange 2007

Hi,

I have recently installed exchange 2007 in my organisation and when a domain user logs in and opens Outlook 2007, it keeps on asking for login credentials, i know this has something to do with autodiscover, even though i have given everyone permissons to autodiscover it is still happening.

Also people get a send/receive error when hitting send/receive even though i thought i had given users permissions to download the OAB from IIS
jonathanduane2010Asked:
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ks_adminCommented:
I fought this, and fought it for months...  

I read over every article on here and was close, but had a hell of a time getting it fixed.  In the end, I finally asked the question myself, and got very specific answers, but should help you issue a new certificate for your use.

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/Q_25359923.html
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shaunrobinson86Commented:

I had an issue similar to this.  Win2k3 Ex07.  All of my Outlook 2007
users were getting prompted over and over for the username and
password.  It wasn't checking the certificate that they had installed
via internet explorer.  To fix the problem, I opened IIS on the
Exchange server and checked the following directories under the
default website (the root site(default web site), oab, autodiscover).
Under the directory security tab, click Edit in the Secure
Communications section.  I had the require SSL checked and the 128bit
encryption, but under Client Certificates, it was set to ignore.  Once
I changed that to Accept for each of the folders, stopped and started
IIS, I stopped being prompted all the time for credentials.

Do an IISRESET from an elevated cmd window (Run as administrator on CMD) and see if that fixes it.
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