Hi All,

Why the following promt occurs again & again in Lync 2013 client?

Hi Manju,

Check this

http://lyncdup.com/2013/05/lync-2013-client-network-password-required-to-connect-proxy-issue/

Hi Raju,

I added the same in IE Lan Settings - Bypass Proxy for Local address & Exceptions

by modifying according to our setup. but the prompt is not stopping!!!

HI

Check this Thread

http://social.technet.microsoft.com/Forums/en-US/lyncdeploy/thread/a6472b8b-c93e-47cf-b668-6666ddf6afd1

http://support.microsoft.com/kb/2298541

Hi Raju,

The outlook integration & Exchange Service looks fine.

I suspect proxy\Firewall related issue.

Ports 443, 5060, and 5061 must be open on the firewall and on proxy servers to enable traffic to pass freely.

What is the above statement meaning. The ports should be open between proxy\firewall & .................???????

I mean which is the target device \ Server?

Hi,
Does this happen for external users?
Have you appiled CU1 for Lync Server 2013.
http://technet.microsoft.com/en-us/lync/dn146014.aspx

Dear Kent,

We are using Lync 2010 server

But we have few Lync 2013 Clients where we are facing this issue.

Lync 2010 Server is up to date

Even Lync 2013 Client is Up to date

:(

Hi,

So this does not happen on Lync 2010 client?

As the issue may occur if firewall or proxy is blocking Lync from connecting to the Exchange Web Services, please try to turn off Windows firewall or third party anti-virus software to test the issue.

In addition, you can try the issue from other workstation.

Its only for Lync 2013 client+2010  Lync Server Combination

Our Lync 2010 Client + Lync 2010 Server combination works fine.

You mean local system windows firewall & AV we need to turn of & check?

Hi,

Here is a similar case for your reference. It seems that Lync 2013 client have some hard coded web lookups to various Microsoft domains.

http://lyncdup.com/2013/05/lync-2013-client-network-password-required-to-connect-proxy-issue/

Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.

Hi Kent,

This i did tested the scenario in my environment by doing the bypass of above said URLs in IE exception - Connection -LAN Settings

I have tried stopping AVs in the Local Machine.

I even tried stopping Windows Firewall, Defender etc

My worry is why it is prompting like 

site\Firewall : localhost

In the above Image of Prompt

I thought this is an issue in the local system

I am really not getting any solution from any where

Please let me know if it is Known Issue,,,, so that we can justify to our management..

Any link to the same :( :( :(

Dear All,

an update for the above::::

I have installed Windows 8.1 64 BIT machine

Joined to Domain

Installed Lync 2013 64 BIT client

But the issue remains same.

I am surprised Microsoft has still not resolved this DVIATION

Please some one guide on

1.Which URLs needs to be bypassed in the Proxy \ Firewall

2.What is exactly blocking the client