• Exchange integration error on HP4120 desktop phones - A CA trust issue

    I would like to go through an integration problem between Lync phone edition devices and Exchange 2010 that I worked on a while ago. Since the integration wasn’t working properly, users couldn’t access call logs, recorded voice mails, calendar...
  • Lync 2010 response group members phones keep ringing even if the remote party hangs up the phone

    In this blog post, I’ll be talking about a response group problem where the response group members phones keep ringing even if the user calling from pstn side hangs up the phone. I would like to talk about how I troubleshooted this issue: ...
  • RDP connections might fail due to a problem with KB2621440 - MS12-020

    I was helping a colleague who was dealing with a Remote desktop connection problem where Windows 8 client was failing to access a certain Windows 2008 R2 SP1 Terminal server. We first collected some logs while reproducing the problem to better understand...
  • Desktop sharing fails between federated contacts running Lync 2010 clients

    I would like to talk about another Lync 2010 problem where desktop sharing was failing between two federated contacts. Network traces and Lync ETL traces were collected while reproducing the problem. Here’s the troubleshooting steps that I followed...
  • External users cannot sign in to Lync 2010

    Today I’ll be talking about a problem where the external Lync 2010 clients fail to sign in through Lync 2010 Edge server intermittently and rebooting the Edge server helps resolve the issue for sometime until the problem reappears. There could be...