Did Microsoft change the MSN protocol last night? Our MSN gateway stopped working for all users last night as did other 3rd party clients and old verisons of MSN…
(In an ironic twist I can’t update my version on MSN as the new live installer doesn’t work with out Microsoft ISA proxy …)
Now with a bit of browsing I think I have the answer: GATE-353
Our proxy details had changed but I had not restarted the server as I thought it would only affect services like update checks. So when the networks team made the change overnight we came in the morning MSN no longer worked. All other protocols worked as we don’t force proxy on non http ports. Also there was no log trace on what happened …