I cannot sign into Lync 2010 from my own PC!

Asked By azalea gomez 0 points N/A Posted on - 03/20/2012

Hello experts,

I am trying to sign into Lync 2010 but I am unable to do it from my PC.

Than I have restarted my PC many times, but I get the same problem.

I have effectively logged into Lync 2010 from another PC.

Both my user ID as well as password is accurate.

What is the reason for this?

I need your help to solve this.

Thanks a lot.

I got this error message:

Cannot Sign in to Lync

The user name, password, or domain appears to be

incorrect. Ensure that you entered them correctly. If the

Problem continues; please contact your support team

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• Question Category: Internet/Email Software

Best Answer by Seymour Dostin

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Answered By Hoting Gracia 5 points N/A #93549

I cannot sign into Lync 2010 from my own PC!

Hi Azalea Gomez the error you are getting is the most common error that is occurred for many of the times as due to some errors occurred at the time of validating of credentials.

The error which you mentioned is occurred due to invalid login details entered and check that all files are present related to your profile in which you are working.

 

The problem must be rectified after restarting the application and it is not yet resolved then the problem may be with the settings of firewall to be enabled so check them once.

 

It's better once to reboot the system and try after the successful reboot is done then there must be completely error free as now you now enter into it by providing valid login credentials.

 

Now you can access profile for sending mails and reading or anything perfectly without error.

 

Thank You.

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• Posted on - 03/20/2012
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Answered By Seymour Dostin 0 points N/A #93550

I cannot sign into Lync 2010 from my own PC!

The thought that came to me at first was this is an issue with reverse proxy.

 

Who doesn’t know the function of a reverse proxy server in “Lync Server 2010”, should note that it handles the remote user’s following traffics

 

• Enabling external users to download meeting content for your meetings.
• Enabling external users to expand distribution groups.
• Enabling remote users to download files from the Address Book service.
• Accessing the Microsoft Lync Web App client.
• Accessing the Dial-in Conferencing Settings webpage.
• Accessing the Location Information Service.
• Enabling external devices to connect to Device Update web service and obtain updates.

As can be seen from the above, the reverse proxy is externally used for meeting content. For troubleshooting, I performed two things to identify whether it was the client who hit the reverse proxy server and found it is malfunctioning. 

 

The first thing: I loaded the Network Monitor on the client. From this I saw that if I add a new distribution list to my contact list (it is a function of the reverse proxy), I am able to watch the request my client makes to the public IP of our Reverse Proxy Server. Moreover, I also am able to access our simple URLs (dialin.domain.com and meet.domain.com) from the outside.

 

So I became sure there is no problem with the functioning of our Reverse Proxy Server.

But when I started an online meeting and tried to upload a PowerPoint presentation, I didn’t see a call to go out to the Reverse Proxy.

 

Then from our reverse Proxy server (Microsoft Forefront Threat Management Gateway –TMG) I take a log to check if anything came into the server with my client IP address. I went to the “Logs & Filter Reports” and changed the filter. See below how to do this –

 

• At the bottom of the dialog, select filter by IP and set the value to your public IP address

   (Public IP can be known by visiting)

 

• Choose update.

 

• When it is ready select Start Query Option

 

In my case I saw no traffic for Web Conferencing ppt presentation. So it is sure that the client is not communicating with the Reverse Proxy, since the logs didn’t show any request to go out.

I was taken aback by this, and tried basic troubleshooting. I tested other web conferencing functionality of the client. I found that utilizing ”polling” or ‘Whiteboarding” results in the exact error every time.

 

So I became sure that it is a Web Conferencing Edge problem, not problem with the client to the Reverse Proxy.

I saw our Web Conferencing Edge and found two errors (there’s no information on them on web- I feel I am lucky)

First Event Log Entry

 

Log Name:      Lync Server

Source:        LS Web Conferencing Edge Server

Date:          5/4/2011 5:42:28 PM

Event ID:      41990

Task Category: (1023)

Level:         Error

Keywords:      Classic

User:          N/A

Computer:      lyncedge.domain.com

Description:

 

Failed to verify client cookie

 

Over the past 44 minutes Lync Server has failed to validate cookie presented by the clients 5 time(s). The last such client which failed validation was “22.33.44.55:50307″.

Cause: This can occur if the Web Conferencing Server and Web Conferencing Edge Server machine time(s) are out of sync. This can also be the result of a client attempting to connect to Web Conferencing Server without having the appropriate permissions.

Resolution:

 

Check to make sure that the Web Conferencing Server and Web Conferencing Edge Server machines and verify that the connection came from a trustworthy client. This could indicate an attack being by a rogue client.

Event Xml:

<Event xmlns=”http://schemas.microsoft.com/win/2004/08/events/event”>

<System>

<Provider Name=”LS Web Conferencing Edge Server” />

<EventID Qualifiers=”50175″>41990</EventID>

<Level>2</Level>

<Task>1023</Task>

<Keywords>0×80000000000000</Keywords>

<TimeCreated SystemTime=”2011-05-04T22:42:28.000000000Z” />

<EventRecordID>20548</EventRecordID>

<Channel>Lync Server</Channel>

<Computer>lyncedge.domain.com</Computer>

<Security />

</System>

<EventData>

<Data>44</Data>

<Data>5</Data>

<Data>22.33.44.55:50307</Data>

</EventData>

</Event>

Second Event Log Entry

Log Name:      Lync Server

Source:        LS Web Conferencing Edge Server

Date:          5/4/2011 5:11:03 PM

Event ID:      41993

Task Category: (1023)

Level:         Error

Keywords:      Classic

User:          N/A

Computer:      lyncedge.domain.com

Description:

 

Failed to process data received from the client

Over the past 599 minutes Lync Server has disconnected clients 1 time(s) as a result of invalid data being received on client connections. The last such client which was disconnected is “22.33.44.55:46361″.

Cause: Failed to process data received from the client

Resolution:

 

Check and make sure that the connection came from a trustworthy client.

Event Xml:

<Event xmlns=”http://schemas.microsoft.com/win/2004/08/events/event”>

<System>

<Provider Name=”LS Web Conferencing Edge Server” />

<EventID Qualifiers=”50175″>41993</EventID>

<Level>2</Level>

<Task>1023</Task>

<Keywords>0×80000000000000</Keywords>

<TimeCreated SystemTime=”2011-05-04T22:11:03.000000000Z” />

<EventRecordID>20543</EventRecordID>

<Channel>Lync Server</Channel>

<Computer>lyncedge.domain.com</Computer>

<Security />

</System>

<EventData>

<Data>599</Data>

<Data>1</Data>

<Data>22.33.44.55:46361</Data>

</EventData>

</Event>

Solution

 

Since restarting the Web Conferencing Edge Service didn’t produce any result, I restarted the Web Conferencing Edge Service on the Front End. It was done!

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• Posted on - 03/20/2012
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Answered By Melon Goan 10 points N/A #93553

I cannot sign into Lync 2010 from my own PC!

In order to resolve the said issue you have to re-licensing your user account. 

For this, first of all you will Login as admin then go to user management and select the user. Under "Licenses” tab uncheck the SharePoint online checkbox and after sometime check it again.

Sometime wrong clock time was also caused the said issue.

Please check and adjust your date and time according to server time and login again after a while.

I hope this could resolve your above said problem

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Answered By mjblindfan 0 points N/A #93554

I cannot sign into Lync 2010 from my own PC!

Thanks a lot "Hoting Gracia","Seymour Dostin" & "Melon Goan" for your effective solutions.

I am facing the same problem and now got solved.

You guys really deserve appreciation.

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• Posted on - 03/29/2012
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Answered By Synthia Alam 0 points N/A #93555

I cannot sign into Lync 2010 from my own PC!

This kind of problem really bothers us. I am also facing the same problem.

Thanks a lot "Hoting Gracia","Seymour Dostin" & "Melon Goan" for your effective solutions. 

You guys really helped me out.

Synthia Alam

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• Posted on - 04/09/2012
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