RPC over http connection exchange 2010 and outlook2010

Posted on 2012-12-21
Last Modified: 2012-12-23
In outlook 2010 I connected by puttings in the servername and username, went into connetions tab, checked the microsot exchange using http, and clicked the button, exchange proxy settings, there I put the following settings:
check connect using ssl only, checked only connect to proxy....
checked on slow.......
under proxy auth....
and thats it I was connected to my exchange 2010.................why did't it asked me for the username and password?
am I missing some setting on my exchange2010? anyone could connect to my exchnage like this? or I have misconfigured a step?
Help plz
Question by:amanzoor
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Assisted Solution

traoher earned 50 total points
ID: 38714821
Were you on a domain computer with domain credential?

If you were using Internet Explorer along a domain account and has forward authentication enable (inside the browser setting), it is passing the domain credential across in the background so you don't see the prompt.

Accepted Solution

Scobber earned 400 total points
ID: 38715466
Try using BASIC authentication on the Proxy settings page. This will be safe because your using SSL in your example

Use DOMAIN\USERNAME or username@domain.local for your username and your regular domain password.
Make sure you change the DOMAIN to what it actually is for your infrastructure

Don't worry about the other security setting in the options before proxy, it can stay on NTLM

HTH Scobber

Author Comment

ID: 38715683
Hi there,
May be this would help me to identify problem:  My OWA is fine and clients work fine. via

''the action cannot be completed.  The connection to Microsoft Exchange is unavailable.  Outlook must be online or connected to complete this action.''
This error pops up everytime I try to connect to my Exchagne 2010 RPC over https with outlook 2010

I am using external address
internal address of server exchage2010:

All top three addresses are inclusive in my SSL certificate:

Outlook 2010: settings:
under connections tab:
connection settings:   (my external OWA address)
connect using SSL only checked
Only connect to proxy servers that have this principal name...........
msstd://  (my internal exchange server name, note that my ssl certificate has this name)
On slow networks, connect using http..............checked
NTLM auth under Proxy auth settings is selected

On my Exchange 2010:
Under EMC:
server config, CAS:

Under Client Access, right click over server name: outlook anywhere External host name: and NTLM auth is selected

Under outlook web app
Internal URL
External URL
under authentication tab, USE forms based auth, UPN selected

Under ecp:
internal URL:
authentication=forms based authentication

Exchange active sync:
internal url:
External url:
authentication tab: Basic auth checked, ignore client cert

inteternal URL:  <<<......note that this is http
External URL:

Under POP3 and IMAP4:
POP3: under authentication, x509 cert:
IMAP4: under authentication, x509 cert:

I need help plz
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Expert Comment

ID: 38716083
as I said previously in my comment

your exchange server is set for BASIC authentication

Exchange active sync:
internal url:
External url:
authentication tab: Basic auth checked, ignore client cert

in your HTTP Proxy settings, change NTLM authentication to BASIC.

then login using your correct username notation and password.

Author Comment

ID: 38716439
Hi scobber,
I have confirmed that I checked the Basic auth in outlook 2010, when I click check names it keeps on poping up username and pass window, I click ok ok, then sometimes the error becomes the same as my last post.
A new error in outlook 2010, 'the name cannot be resolved the connection to mic exchange is unavailable.  Outlook must be online or connected to ..............................
Help plz

Author Comment

ID: 38716457
Is it normal.  On my exchage 2010 under iis when I click to browse the default website *80(http) it gives 403.4 forbidden the page you are trying to access is secured with ssl....
where as browse 443 is fine
LVL 15

Assisted Solution

Rajkumar-MCITP earned 50 total points
ID: 38716849
Yes. that is normal... OWA published by default with the ssl cert and normal access using http will show the warning to use https..

Author Comment

ID: 38717674
OK finally I got connected:
In outlook 2010
Under the server: it should be the name of the local server
username: only username
Under connection via http:
select both options of http
Basic auth

Author Closing Comment

ID: 38717675
Thank all I really appreciate your time.

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