Out of office not working behind proxy for Outlook 2007 users.
Hi Everybody, I have upgraded my Exchange 2003 to Exchange 2007SP1. Everything works fine, except Out Of Office of Outlook 2007 users. Whenever they click on out of office message appears as " Your out of office settings cannot be displayed, because the server is currently unavailable. Try again later." Authentication for Autodiscovery in IIS is Windows Authentication and on EWS is Windows Authentication. All PCs are joined to domain. Out of office works fine in OWA as well as for other Outlook clients only issue with Outlook 2007 users. Another strange thing is if I de-select proxy settings in Internet Explorer connection settings, Out of Office box appears and works perfectly. As soon as enable proxy settings in Internet Explorer, message stated above again appears. What extra settings I need to do? Can somebody help me?Mukesh Sutar
October 23rd, 2009 9:21am

What kind of proxy are you using? Is this a ISA? If yes, Have you configured ISA to let through traffic to the /OAB directory. This is configured on the webpublishing rule and path tabAlso check and make sure that you have configured autodiscovery correct with all URL's containing names that are also in the used certificate.Also have a look into the followin linkshttp://technet.microsoft.com/en-us/library/bb124251.aspxhttp://technet.microsoft.com/en-us/library/bb201695.aspxhttp://technet.microsoft.com/en-us/library/bb332063.aspxRaj
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October 23rd, 2009 9:43am

Yes, we are using ISA and it is configure for /OAB directory. Certificate contains all the URLs which we normally use to access the mailbox. Only thing I have observed is when I run get-WebServicesVirtualDirectory -identity "CAS01\EWS (Default Web Site)" |fl, nothing is displayed infront of externalurl field, i.e., externalurl is not defined. Is is necessary to define the externalurl?Mukesh Sutar
October 23rd, 2009 10:11am

Ideally yes, you need to set the URL for EWS. Can you try setting the URL http://technet.microsoft.com/en-us/library/bb201695.aspxRaj
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October 23rd, 2009 10:23am

Hi,I agree with Rajinish. You need to configure the external URL for EWS.Also you can publish the EWS virtual directory via ISAwhen you publish Outlook Anywhere.Publishing Exchange Server 2007 with ISA Server 2006 http://technet.microsoft.com/en-us/library/bb794751.aspxRegards,Xiu
October 26th, 2009 9:43am

Hi,It has been configured. I have configured External URL for ews and in ISA also EWS is publised, but nothing helped much. Getting the same error. Mukesh Sutar
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November 3rd, 2009 11:09am

common friends, please help me to resolve this.Mukesh Sutar
November 6th, 2009 7:41am

When I run Get-AutodiscoverVirtualDirectory -Server cas01 | fl InternalUrl,ExternalUrl, both URL are blank. Is this has to do something with the OOF? How I can set these two URLs?Mukesh Sutar
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November 6th, 2009 9:33am

is your certificate properly set? Run these two commands 1. Set-OutlookProvider EXPR -Server $null -CertPrincipalName $Null2. Set-OutlookProvider EXCH -Server $null -CertPrincipalName $NullRaj
November 6th, 2009 9:38am

What will be the effect of this two commands? I ran following command get-outlookprovider, output is as below Name Server CertPrincipalName TTL ---- ------ ----------------- --- EXCH 1 EXPR 1 WEB 1 What it indicates? Mukesh Sutar
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November 9th, 2009 10:40am

Can somebody help me?Mukesh Sutar
November 16th, 2009 10:09am

We had this same issue and either adding the CAS server to the proxy exception list or ( in our case ) add *.yourdomain.com to the exception list in IE on the affected clients seemed to resolve it. We use an iPrism proxy server.
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November 20th, 2009 7:34pm

Thanks. It worked without any glitch. problem has been resolved for users sitting behind proxy server. We are using squid as proxy server to access the internet. It didn't worked for users, whose machines are not joined to domain. I joined those machines to domain, logged in to domain with user id and password. I connected to net using dialup connection, and tried to set out of office, it worked. Only problem remaining is, some top management user's machine are not joined to domain, they use administrator account to log into workstation. Do I need to change authentication settings on IIS on exchange CAS server? Current authentication is set to Basic+Integrated Windows. Mukesh Sutar
November 23rd, 2009 10:29am

Thats easy it means that when Outlook looks for the cas servers the query goes to the proxy..just add the cas fqdn on the proxy exclusions to bypass.cheersCapecolMCSA - MCTS Exchange Server 2007
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November 25th, 2009 8:34am

If user is connected to internet via dial-up connection, whether exclusion in proxy settings does really matter?Mukesh Sutar
November 26th, 2009 12:23pm

It worked without any problem on dial-up connection even with with Administrator login. Only problem remaining now is user sitting in domain with Administrator login. Rest all problems related to out-of-office are resolved now. But now every time I start outlook, it prompts me to enter user id and pasword for "autodiscover.domain.com" even when I am inside the domain. How to disable this prompt? Mukesh Sutar
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December 1st, 2009 8:07am

Now Out-Of-Office problem has been completely resolved. I think I have to start new post regarding autodiscover password prompt.Mukesh Sutar
December 23rd, 2009 6:53am

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