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1. #LYNC FOR MAC 2011 THE SYSTEM IS UNAVAILABLE NOW REGISTRATION#
2. #LYNC FOR MAC 2011 THE SYSTEM IS UNAVAILABLE NOW WINDOWS#

#LYNC FOR MAC 2011 THE SYSTEM IS UNAVAILABLE NOW REGISTRATION#

In fact, the initial Registration attempt is accepted straight away by the Front End. It also interesting to note that a mobile device doesn’t appear to go through the same process. For more info, please see me post here ( ). The Lync Server Remote Connectivity Test never gets past the “unauthorized” response from the Front End, and fails after 20 attempts, although I can’t capture the Web Ticket info in the same detail on the Front End, even when enabling the WebTicketAuthLib in the logger. My reason for my asking is that whilst I’m NOT having any issues with any client logging in from any device, I am having issues in testing my deployment via the ‘Microsoft Remote Test Analyser’ service for the “Lync Server Remote Connectivity Test”, and perhaps some issues on mobile devices (Android) that seem to time out occasionally. I was never satisfied with the simple answer I kept seeing that was, “this is normal”! I also wondered why I was not capturing the same info on a SIPStack log taken from the Front End, however, can I ask where the Web Ticket component is tied to in relation to an external user logging in via an Edge? Is this directed through the reverse proxy to the Front End, or via the Edge? I had wondered why I was seeing the 3 “unauthorized” responses during the registration process, but this provides me with a whole heap more detail.

#LYNC FOR MAC 2011 THE SYSTEM IS UNAVAILABLE NOW WINDOWS#

Now what if we didn’t have Wireshark running on the client machine when it failed to login? Well remember the second check box we set on our Lync client software? Well if we go look in the Application log of Windows Event Viewer we will see the following Warning message. The client would have assumed internal connectivity with the first A record and external connectivity with the last two A records.

When this failed we looked for SIP, then SIPEXTERNAL. The next A record we look for is SIPINTERNAL followed by the right hand side of the symbol. When those fail we will fall back to searching for A records and making assumptions about port numbers. If those succeed we get a host name and a service port for our connection. The DNS query is constructed by the client by taking _sipinternaltls._tcp and then adding whatever is to the right hand side of the symbol in the user sign in dialog box. This is important because this lets the client machine know whether it is logged in internally or externally. The first SRV record would be for internal client logins and the second one is for external (i.e. First, we see that the first two queries are for SRV (service locator) records. If we look at these DNS queries we notice a few things. I wanted to show how the Lync client automatically finds its servers for logon purposes. Of course these failed as I have not done any of the DNS records for automatic client login support in my sandbox lab yet. So the client tried to query DNS for _sipinternaltls._tcp., _sip._tls., sipinternal., sip.