Solved

Bypass ISA proxy for Outlook Anywhere

Posted on 2014-10-24
8
341 Views
Last Modified: 2014-11-04
Have a network using ISA 2004 as a web proxy.  This is shortly to be removed.

In the meantime, the client has been migrated to a hosted Exchange service and ISA is blocking Outlook Anywhere connections.  I understand that ISA breaks the RPC-over-https protocol and needs to be bypassed, but how is this done?

I have removed the web proxy filter for all HTTPS but still not working
0
Comment
Question by:devon-lad
  • 4
  • 3
8 Comments
 
LVL 5

Expert Comment

by:Flora
ID: 40401253
0
 
LVL 1

Author Comment

by:devon-lad
ID: 40401274
I think this is related to external clients and in-house Exchange.  Our situation is the other way round.
0
 
LVL 30

Expert Comment

by:Gareth Gudger
ID: 40403184
It may not be an ISA issue at all. It could be DNS related. Do you have any DNS records that are referencing autodiscover and pointing it to the ISA or the old Exchange server directly? Could be A, SRV or even an SCP. If not, may also need to create one if using split-DNS to point to the hosting service. Basically clients may be defaulted to an old internal environment.
0
 
LVL 1

Author Comment

by:devon-lad
ID: 40406079
Gareth,

You may well be right.  We'd been having a lot of account lockout issues which were SCP related.  An I've just realised the test machines setup to bypass the proxy are using external DNS.  The red herring is that one internal machine using internal DNS does not have a problem.

Going to remove Exchange today, so will see if that solves it.
0
How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

 
LVL 30

Expert Comment

by:Gareth Gudger
ID: 40406848
Awesome. That will likely be the final fix.
0
 
LVL 1

Accepted Solution

by:
devon-lad earned 0 total points
ID: 40412829
Turns out it was proxy settings being applied by a group policy to most but not all workstations.

They have the same internal and external domain name and most of the workstations were set to bypass the proxy for all traffic to *.companydomain.com.  Changed this to the specific internal web hosts used and Outlook started working.
0
 
LVL 30

Expert Comment

by:Gareth Gudger
ID: 40414562
Awesome. Be sure to accept your own comment as the solution.
0
 
LVL 1

Author Closing Comment

by:devon-lad
ID: 40421143
Found own solution
0

Featured Post

Why You Should Analyze Threat Actor TTPs

After years of analyzing threat actor behavior, it’s become clear that at any given time there are specific tactics, techniques, and procedures (TTPs) that are particularly prevalent. By analyzing and understanding these TTPs, you can dramatically enhance your security program.

Join & Write a Comment

Suggested Solutions

Title # Comments Views Activity
Junk folder 23 109
Mdaemon Migration to office 365 4 35
change of time zone for bulk users in exchange 2013 6 26
outlook 3 19
Follow this checklist to learn more about the 15 things you should never include in an email signature from personal quotes, animated gifs and out-of-date marketing content.
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.
To show how to generate a certificate request 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 Servers >> Certificates…
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…

708 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

13 Experts available now in Live!

Get 1:1 Help Now