"Network Unavailable"

Question

I seem to have a strange issue.&nbsp; Really hard to search for this because the error being stated doesn't match what is going on.&nbsp;When I try to use Skype for business on my work computer it states "Network Unavailable".&nbsp; This is the only computer on the network that has this issue and the problem started after a power outage in the building.&nbsp; The computer has all network functionality except with Skype for Business.Things I've tried with no results:Restarted workstationTried running the fix on Microsoft office (since Skype for Business is part of the package)Made sure the computer had all Group PolicyRestarted the Skype for business server on local network.Made sure firewall settings were set properly and all services running.&nbsp;Not sure what could be causing the Skype for Business to say "Network Unavailable".&nbsp; Any and all help is appreciated.

thet naing · Answer

Network Unavailable as in You cannot even login to Skype for Business or You are able to login to Skype for Business but unable to make a call or IM to others? Which one?

Please share some screenshot to draw some clues what's going on.

allen hood · Answer

I cannot log in.&nbsp;&nbsp;&nbsp;No one using this computer can log in.&nbsp; It's not just my account either.&nbsp; I can log into my account on other computers.&nbsp; Just not this one.&nbsp; It makes me believe the problem is local to the computer but not profile related.&nbsp;Hopefully this picture helps.

thet naing · Answer

I see, you mentioned all other users are able to login, only from your PC, right? It looks like it's DNS/network related issue.&nbsp;1. Please check if your account is "enabled/provisioned" in your SFB server?&nbsp;2. It looks like your PC is not able to reach or make a successful SFB server auto-discovery. Did you set any manual SFB server under "Options &gt; Personal &gt; Advanced Connection Setting?&nbsp;2.1 A quick way to check and verify is compare your PC's Network settings, for example, subnet, gateway and DNS against another working PC's.&nbsp;3. Download Lync Connectivity Analyzer here&nbsp;https://1drv.ms/f/s!AvBNRjYUuhsvjbtI7W-J2JRe7MtaPw&nbsp; and follow this guide to check what exactly went wrong.https://ucmart.uk/2017/07/04/copy-of-lync-connectivity-analyzer-download-link&nbsp;4. Are you able to login using your mobile phone or from outside of your office network, like from your home?&nbsp;

thet naing · Answer

I simulated your issue, I got the exact same issue when my Wireless Network is down - basically means the&nbsp;network your PC is connected is not able to reach to or resolve to SFB server.&nbsp;&nbsp;You need to&nbsp;check with your network engineer/team.&nbsp;&nbsp;

allen hood · Answer

Thet Naing,&nbsp;I am working on a workstation that doesn't use Wireless.&nbsp; It doesn't even have Wireless capability.&nbsp; I do agree that this has something to do with the PC not able to resolve to the Skype For Business server.&nbsp; The computer I am working on does have Internet connectivity and can connect to other parts of the network it is connected to.&nbsp;

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"Network Unavailable"

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