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Outlook 2007 Cannot connect to Exchange 2003 via RPC over HTTP

Posted on 2007-12-03
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Last Modified: 2008-02-01
hi,

im running rpc over http on my exchange server and have set it all up with certs etc and all works really well on a outlook 2003 and windows xp pro setup. but if i try to get the same thing working on vista ultimate with outlook 2007 laptop it simply wont work.

Is there something im missing here?
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Question by:kingcastle
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Expert Comment

by:Sembee
ID: 20397815
Should be fine with that combination.
Does the client pass the certificate test? https://host.domain.com/rpc 
Are the certificates you are using purchased or self generated. (I know you have just closed a question on this, but I cannot remember and needs to be in this question in case anyone else looks).

Simon.
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Author Comment

by:kingcastle
ID: 20398469
thats a bit weird if i goto https:\\mail.mydomain.com its brings up the Under Construction page from IIS but if i go https:\\mail.mydomain.com/rpc it says "You are not authorised to view this page, you do not have permission to view this this directory. Unauthorsied access due to ACL set on requested resource.

I installed the cert from Rapid SSL.

Cheers
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Author Comment

by:kingcastle
ID: 20398484
this is really strange i just checked again to see if it does work from xp and outlook 2003 and sure enough when i open up outlook it asks for a username and password and once i enter those credentials i get all the mail etc.
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Expert Comment

by:Sembee
ID: 20399976
The authorisation failure is normal for /rpc - it is SSL certificate support that you are looking for. If you have a RapidSSL certificate then that shouldn't be an issue.

The main cause of authentication prompt is a type mismatch. So integrated set on the virtual directory and basic in Outlook - or vice versa.

Simon.
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Author Comment

by:kingcastle
ID: 20400063
so if that part looks ok and it seems to work ok on outlook 2003 and xp and not on vista ultmate with outlook 2007, were do i go from there do you reckon?

ta
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Expert Comment

by:Sembee
ID: 20400119
Seems to work or does work?
On Outlook 2003 does the connection status (right click on Outlook icon in system tray while holding down CTRL) show HTTPS or TCP/IP connections?

Simon.
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Author Comment

by:kingcastle
ID: 20400151
just checked, on outlook 2003 it defo say conn is https

ta
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Author Comment

by:kingcastle
ID: 20408272
still struggling on this one, i reckon it must be to do with the cert. if i goto https:\\mail.mydomain.com\rpc it does not throw me up the usual "do you trust this site etc...." that it i would usually see from a https site and you then click yes or no, but then again the blooming thing works under xp and outlook 2003
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Accepted Solution

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Sembee earned 500 total points
ID: 20416364
You don't want to get a trust issue with the certificate. If you do then RPC over HTTPS fails. If it passes that test then it isn't the certificate at fault.

Simon.
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Author Comment

by:kingcastle
ID: 20416385
hi simon

i finally got this working, what i had to do in the end up was change the authenication on outlook anywhere settings on outlook 2007 from NTLM to Basic. Once i did that it asks for username and password and once i enter them it connects. I checked the connection status of outlook and it says it HTTPS so i assume this is as secure as i am going to get it.

Cheers for all your help its brilliant
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