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Windows

7

Fixing AOL Instant Messenger connectivity problems in Microsoft Lync 2010

February 11th, 2011 | Lync, Tech, Windows | Max Sanna

During our Lync 2010 deployment we had some problems with AIM connectivity, with the following symptoms:

  • Presence would take up to 30 mins to update on both clients
  • Messages in both directions would get lost 90% of the times, with some random ones getting through
  • Lots of 481 “Call Leg/Transaction does not exists” errors coming up in the SIP Stack log on the edge server

I had to work this out with Microsoft, and as it turns out it’d have been a very difficult one to debug. The bottom line is that when the provider of your public Lync Edge UC Certificate uses different SSL Cyper Suites from the ones AOL expects, it will try them all until it will eventually timeout and return errors, which happens most of the times.

The following solution will change the order of the Cyper suites and magically AIM will start working fine.
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13

Integrating Microsoft Lync 2010 and 3CX using Freeswitch

February 1st, 2011 | SIP, Tech, Windows | Max Sanna

This guide is the product of a discussion we had on the Technet forums, which addresses the need of some users to deploy Lync 2010 while keeping their legacy 3CX system working for current desk phones.

It wouldn’t have been possible for me to get to this result without the brilliant help of Drago Totev, who provided the initial idea of using Freeswitch and a useful guide which helped me set up the basic system with Lync 2010. This guide re-uses portions of his tutorial with permission.

By the end of the tutorial you should be able to receive incoming calls and make both Lync and 3CX ring at the same time, and perform outbound calls as well from both systems.

I’ll try to keep this guide updated over time, if I get any useful suggestions from the community, anyways, here’s the download. Enjoy it!

Download: Integrating Microsoft Lync 2010 and 3CX Phonesystem using Freeswitch

This is our goal

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1

Fixing Outlook Web App + UAG on Mac OS X 10.6

December 6th, 2010 | Mac, Windows | Max Sanna

If you have a Mac and your company is running Microsoft Exchange 2010 with Unified Access Gateway to publish Outlook Web App on the internet, chances are you’ve been bashing your head when trying to access it remotely from your Mac, with Safari hanging during the connection.

This is becoming an increasingly common setup, given the fact that UAG provides a convenient way to securely publish Exchange services on the Internet, and can check client computers for compliance with company policies upon connection (anti virus, firewall, etc.), but this compliance check seems to go wrong on Snow Leopard and Safari.

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