Unable to Connect to Microsoft Online Services (Lync) behind ISA Server

1. Introduction   BPOS is growing in a fast pace and as IT Admins starts to use this service they need to adjust their Firewall in order to proper allow the traffic to traverse the on-premise clients to the cloud. Microsoft Online Services did a good job documenting what needs to be in place from…


Double authentication prompt when accessing Exchange Control Panel published through ISA Server 2006

1. Introduction Recently I worked in a case in collaboration with Exchange team where the messaging administrator was experience a double authentication prompt while accessing the Exchange Control Panel through OWA. Exchange Control Panel is a new feature of Exchange 2010, to read more about it access the article New Features and Improvements in Exchange…


This is not an ISA Question

ISA is an application that sits on the top of the Windows OS and consumes many OS features and functionalities. Many administrators still confused about what it is and what it is not an ISA related issue. I decided to enumerate the top five common questions (or misconceptions if you will) about ISA in four…


New Articles at Tales from the Edge

We just released two new articles on the Tales from the Edge community site. Here are the link for those articles: Network Monitor 3.3 RWS Parser Basics, Part 1: Introduction to RWS Protocol Analysis Understanding the Re-Injection Mechanism Improvement on Forefront TMG I hope you enjoy it !!


Thanks for your participation

I would like to say thanks for all partners that joined this morning to the troubleshooting performance issue on ISA Server session, it was great to share some ISA Perf best practices with you all. We had a great audience from many locations (US, Europe, Brazil and other places), which makes me really proud since…


ISA Server triggers lots of 14197 events

1. Introduction   This post is about a scenario where Firewall Administrator notices that the application log in the ISA Server computer is full of events 14197 saying:   Event ID 14197 Source Microsoft Web Proxy Type Error Description ISA Server failed to write content to cache file. The error code in the Data area…


My SMTP Server is on the Blacklist, now what?

1. Introduction Recently the number of times that I received this question increased (not sure why), but the fact of the matter is that you can do something to resolve this problem (or at least identify the source of the problem), if you have the right tools. When your ISP informs you that you are…


Troubleshooting ISA Server 2006 Performance Issues – WebCast for MS Partners

Next February 9th 11:30 AM CST I will be delivering a presentation about Troubleshooting ISA Server 2006 Performance issues for Microsoft Partners, if you are a partner and deal with ISA Server you should watch this presentation. Here it is the agenda with the core topics that will be covered: What about understanding the issue…


Error “Object doesn’t support this property or method” while browsing a site published by ISA Server 2006

Introduction   This post is about an interesting issue that I recently worked where firewall administrator published an internal web site through ISA Server 2006 and when it tries to load the main page some components didn’t load correctly and the error message below appeared:     The issue didn’t happen when browsing the web…