Solved

Exchange 2010 CAS Proxying is not working

Posted on 2015-02-13
4
32 Views
Last Modified: 2016-06-23
We're running two AD sites with Exchange 2010 SP3. One site is Internet facing and the other is not. OWA and Activesync work for mailboxes on the Exchange servers that are Internet facing. OWA and Activesync are not working for mailboxes in the non-Internet facing site. The two AD sites have two different CAS Array names.

The CAS servers in the Internet facing site are actually multi-role servers (Mailbox, Hub Transport, and CAS). The CAS servers in the Internet facing site also use an F5 load balancer.

The CAS servers in the non-Internet facing site are CAS\HT servers only. They are in an NLB cluster because we could not afford an F5 load balancer in the non-Internet facing site.

The external and internal URLs are populated on the Internet facing servers but the external URL is not populated on the non-Internet facing servers. The non-Internet facing servers have the internal URL populated with the hostname of the CAS Array in the non-Internet facing site.

When I use the external URL for OWA and Activesync to access a mailbox in the non-Internet facing site it does not work. However when I use the hostname for the CAS Array in the non-Internet facing site OWA and Activesync work. Any help ore suggestions would be greatly appreciated.
0
Comment
Question by:william_benson
  • 2
4 Comments
 
LVL 19

Expert Comment

by:Adam Farage
ID: 40608260
1) Any errors on the CAS in the non-internet facing site
2) what happens if you try to proxy a connection from an external source?
0
 
LVL 1

Author Comment

by:william_benson
ID: 40608559
1. Proxying the connection from internal and external sources fail.
2. I don't see any Errors or Critical alerts in the Event Viewer.
3. What I see in the browser when I try to connect is I put in my credentials then I get redirected to the CAS server in the  non-Internet facing site. I put in my credentials again and the screen goes white and never renders OWA. I can connect via Outlook with no issues.
0
 
LVL 1

Accepted Solution

by:
william_benson earned 0 total points
ID: 40612512
I fixed it :) I just had to configure Windows Integrated security on the non-Internet Facing servers.
0

Featured Post

Integrate social media with email signatures

Is your company active on social media? Do you also use email signatures? Including social media icons in your email signature is a great way to get fans for free. Let all your email users know you’re on social media quickly and easily, in a single click.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
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 Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

910 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

24 Experts available now in Live!

Get 1:1 Help Now