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Unable to login to Skype for Business client?


Unable to login to Skype for Business client?
In order to sign-in on Skype (Lync) you must have login credential provided to you from your organization.
·        Sign-in address: bilag@orgname.com
·        User name: orgname\bilag
·        Password: ************
 

Note: Orgname.com is my SIP domain name.
Here are the most common mistake people make while sign-in on Skype for Business (Lync).

1.     If you have login credential however still unable to sign-in then make sure you are putting proper login credential.
Below error shows when you are wrong entering your sign-in address:
 

2.     If you are writing correct Sign-in address however getting DNS error then contact administrator/ Support team there may be a DNS resolution or configuration issue. Administrator need to verify the SfB (Lync) AutoDiscover DNS records.
3.     Sometime users password may expired/ lockout:
Make sure that you password is not expire and lockout. If yes then call to helpdesk and reset your password / unlock.
4.     Make user to have updated Skype for Business client installed. Check client version (Skype for Business > Options > Help > About Skype for Business and see the version details.
5. Take action as appropriate for your situation or per error message:
a.     There was a problem acquiring a personal certificate required to sign in. If the problem continues, please contact your support team.
There may be cached certificate or credentials are expired or corrupted. You can clear cached credentials and certificates.
1.     Delete temporary file (Start > run > %temp% and delete files.
2.     Start > Run > Cmd > type   ipconfig /flushdns
3.     Try to Sign-in again
b.     There was a problem verifying the certificate from the server. Sign-in may be delayed while we retry the connection
Basically client can't verify the certificate chain from the domain root server certificate.
1.     Verify that clients have trusted root certification authority (CA) installed.
2.     Follow the step by step process here
c.      Cannot sign in to Lync because your computer clock is not set correctly. To check your computer clock settings, open Date and Time in the Control Panel.
Basically your computer clock is not set correctly or may be the time or date is set incorrectly on the device.
·        The system time or date is more than five minutes off from the time or date of the Skype for Business (Lync) server.
·        Go to the Control Panel > All Control Panel Items > double click on “Date and Time” > change date and time.

d.     Sign-in address was not found.
This is authentication error: User isn't licensed for Skype for Business Online or may be not enable for Skype for Business in on-premises.
Verify that the user is licensed for Skype for Business Online. Verify that the sign-in address (SIP) is entered correctly and enable in Skype for Business.
If you are getting Sign-in address not found error continually and you are using Skype for Business Online then have to add a firewall entry for msoidsvc.exe to your proxy server. Below is step by step process to add firewall entry.

NOTE: The following steps assume you are using Microsoft Forefront Threat Management Gateway (TMG) 2010. If you have a different web gateway solution, use the settings described in step 4 below.

To create an application entry for Msoidsvc.exe in Forefront TMG 2010, follow these steps:
1.     In the Forefront left pane, click Networking.
2.     Click the Network tab. Under the Tasks tab in the right pane, click Configure Forefront TMG Client Settings.
3.     In the Forefront TMG Client Settings dialog box, click New.
4.     In the Application Entry Setting dialog box, configure the following rules:

Application
Key
Value
msoidsvc
Disable
0
msoidsvc
DisableEx
0

For details, see the Microsoft Knowledge Base article 2409256, You cannot connect to Lync Online because an on-premises firewall blocks the connection.
 
6.  Finally enable logging on Skyep for Business (Lync) client and reproduce the issue and send log to your IT support Administrator.
How to enable Logging on Skype for Business Client for Windows?
UCCAPILOG diagnostic log are good for deep level troubleshooting. It gives you complete insight on who Skype for Business (Lync) client, how media and signaling traffic flowing. Also allows administrator to do deep level troubleshooting.
1.     From the Skype for Business Client Click on Tools > Options > General.
2.     Under the Logging in Skype for Business: select as Full
 
3.     Click OK 
4.     Restart Lync Client.
5.     Attempt to replicate the issue.
6.     Logs can be found in \tracing
Exact path for Lync 2013 client: %localappdata%\Microsoft\Office\15.0\Lync\Tracing
There will typically be a searchable error in there a clue to point you for issue.
Thank you.
 

 

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