The second troubleshooting step was to add an Application Entry Setting for the Live Messenger EXE files into the Forefront TMG Client Settings, so as we could avoid connection problems isolating these files: We then created an access rule to allow the Internal Network to the Domain Set.Īdd Application Entry Settings for Live Messenger Exes For this we created a Domain Set called that included *.msn.com, *. and *. Our first troubleshooting step was to create an access rule in Forefront TMG allowing user access to Live Messenger websites. These files were msnmsgr.exe, VCSoapClient, VpxClient and wlcomm.exe. When testing access using a workstation with the Forefront TMG Firewall Client, we could see several exe files appear in the Forefront TMG logs.

Once the credentials were authenticated, this process would no longer be started.Ģ. I realized there was a process trying to send user credentials only on the first logon attempt. I logged in normally using a workstation that was not going through the corporate proxy, and then when trying to log in again using a proxy server, it worked fine. There was no way to log in to Live Messenger 2011 when working from an environment with a proxy solution, but once a successful login is made (without a proxy) the problem disappears. The tests revealed some weird behavior as described below:ġ. When our Network Operations Center started receiving complaints from customers about their Live Messenger connection, I started doing some lab tests to troubleshoot the issue. Troubleshooting Live Messenger Login Issues Older versions, such as Live Messenger 2009 did not have these login problems, only Live Messenger 2011. Signing in to Windows Live Messenger failed because the service is temporarily unavailable.

Translation: We can’t sign you in to Windows Live Messenger. On July 22nd 2012 Microsoft pushed all users to the latest Live Messenger version (Live Messenger 2011).įor most users, everything worked fine, but for many organizations working behind a proxy solution such as Forefront TMG, it was impossible to log in.Īfter typing credentials to log into Windows Live Messenger 2011, users received the message below (in our case in portguese):

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