Solved

How to avoid the password prompt when connecting to Exchange via RPC over HTTP

Posted on 2006-06-30
10
561 Views
Last Modified: 2012-08-13
Hello:

I have seen many previous posts on this issue and was hoping not to add to it again, however, I just can't seem to get this to work.  I cannot bypass the password prompt when accessing outlook over http.

On the client, when I use NTLM authentication I am continually prompted for the password.  I did make the necessary changes to the lmcompatibilitylevel key in the registry setting to to both 2 and 3 still with no luck.  The client is on the same domain as the exchange server

On the Exchange server (and the RPC virtual directory in IIS) I currently have none of the authentication options selected.  I have tried selecting Basic authentication as well still with no luck!

Can anyone help me with this issue?  Where am I going wrong?
0
Comment
Question by:tdcitstaff
10 Comments
 
LVL 18

Expert Comment

by:amaheshwari
Comment Utility
0
 

Author Comment

by:tdcitstaff
Comment Utility
Thanks for the link, however, I am not using a Frontend/Backend configuration.  Only one Exchange server.  I still tried the configuration as suggested, however it still did not work, once I set the client to use NTLM it keeps continually prompting for the password.
0
 
LVL 104

Accepted Solution

by:
Sembee earned 500 total points
Comment Utility
If the client machine is on the same domain as the Exchange server, you shouldn't get the prompt.
Make sure that the authentication settings are correct on the /rpc virtual directory in IIS Manager. They should be integrated and basic ONLY.
Using basic authentication isn't an issue as you are also using SSL.

Simon.
0
 

Author Comment

by:tdcitstaff
Comment Utility
You say the /rpc virtual directory should be set to integrated AND basic?  I'ver set it to both, however, once I select NTLM on the client, it does not allow me to connect at all, as it keeps prompting for the password.   With Basic authentication set on the client, I am prompted once, but once I enter the password I am connected via http (I am running outlook with the /rpcdiag switch).  Any further suggestions?
0
How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

 
LVL 104

Expert Comment

by:Sembee
Comment Utility
I go by my working deployments, of which there are many.

With the client machine being a member of the same domain as the Exchange server, with the authentication settings as I have outlined above, and NTLM Authentication set in Outlook - I get no authentication prompt. I deploy this feature so that it is totally transparent to the users.

The KEY thing is that the machines are all in the same domain so that pass through authentication is used.

Simon.
0
 

Expert Comment

by:mostym
Comment Utility
I am having the same problem...
0
 

Author Comment

by:tdcitstaff
Comment Utility
Simon.

What firewall are you using in your configurations?  I am using ISA 2004 and I suspect that the problems may be with the ISA rules.  I tried this - http://support.microsoft.com/kb/884506/en-us - however that too did not seem to work.

Can you shed any light in this area?
0
 
LVL 104

Expert Comment

by:Sembee
Comment Utility
I don't use ISA in any configuration.
I have deployed RPC over HTTPS lots of times with real firewalls. Cisco PIX and Watchguards accept it with very little configuration.

Simon.
0

Featured Post

What Security Threats Are You Missing?

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

Check out this infographic on what you need to make a good email signature that will work perfectly for your organization.
Scam emails are a huge burden for many businesses. Spotting one is not always easy. Follow our tips to identify if an email you receive is a scam.
In this video we show how to create a User Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Recipients >> Mailb…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…

771 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

8 Experts available now in Live!

Get 1:1 Help Now