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Skype For Business

Skype for Business – Unable to share Poll, whiteboard and Powerpoint presentation

Hello all,

I had an issue recently where one user was not able to share a poll, a whiteboard and a Powerpoint presentation.

The infrastructure was Skype for Business 2015 Server Standard with last CU (June 2016) and the clients were all having Skype for Business version 16.0.4432.1000.

But for only user this was not working and when he tried on another computer then it was working so it was due to his computer…

Indeed the KB3118288 was missing and as soon as we installed it, everything started to work on this computer.

Installing the KB does not change the client version and stay 16.0.4432.1000

Hop this will help some of you !

LYNC/SKYPE FOR BUSINESS – Powerpoint/Whiteboard/Poll not working

Hello all,

It has been a long time since I have not write a new post but that day I got a new issue.

On a fresh new Skype for Business environment, I had an issue with the Powerpoint sharing no more working (was working some days ago…).

So I started to check all my config and check what changes I have done since it is no more working, I haven’t found something related to this issue.

So I used fiddler to check what is happening on the client side and see that the client never tried to reach the Office Web App server so I understood that the error was between the Lync/S4B client and the front-end.

Then I saw that article -> http://tomtalks.uk/2016/05/microsoft-net-security-update-ms16-065-breaks-lync-server-20102013-skype-business-server-conferencing/#comment-100590

And remember that the admin installed some updates in the last days.

So I followed the MS article -> https://support.microsoft.com/en-us/kb/3165438

In my case, the key “HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\v4.0.30319\System.Net.ServicePointManager.SchSendAuxRecord” wasn’t existing on my front-end so I created it and created the DWORD value. I restarted the RCTDATAMCU and after restarting my S4B client, the powerpoint sharing worked again !!!!!

I would like to thanks Tom for his help.

Bye

LYNC – External users connected to a different AD domain cannot sign in Lync

Hi all,

We faced a new issue recently with some users unable to sign-in Lync, they were stuck at the sign-in step.

Those users are connecting to Lync through our Edge servers as they are not in our local network and they are also joined to their own AD domain.

We found a temporary workaround by launching the Lync client as an administrator, then entering the user’s credentials make him able to connect successfully.

According to MS engineer, here is the explanation of this behavior :

I have analyzed logs captured so far and the problem seems that in scenario that is working (admin account) client is using already cached Lync certificate from credential manager. In non-working scenario client is not able to retrieve certificate from credential manager and fallback to NTLM. As client is connected externally, Kerberos can’t be used.

                NTLM authentication then request for credentials if already stored credential in credential manager is not up-to-date or account just doesn’t have permissions.

So now, how can we correct this issue :

You need to create the following value: HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\15.0\Lync

Name: DisableNTCredentials  Type: REGDWORD Value:1

This value will force Lync to prompt for credentials in case no valid certificate can be found.

Enjoy !

Lync – Import contacts from a user account to another one

Hey,

Usually, we need to perform an export/import of the contacts of a user for a migration purposes.

Today, someone asked me to delete a Lync account and enable a Lync Account on a new AD account and migrate the contacts from the old one to the new one.

This is something possible with the commands “Export-csUserData” and “Update-csUserData”. Don’t use the command “import-csUserData” because it will not work.

The difference between the two commands is that “import” replace while “update” just append the data (which is not a problem as the destination is new).

The process is like this :

  1. Launch the command “Export-CsUserData -PoolFQDN poolname -FileName filepath.zip -UserFilter UserSipAddress
  2. A zip is created containing the data
  3. Launch the command “Update-CsUserData -FileName filepath.zip -UserFilter UserSipAddress
  4. The contacts are now in the new Lync account

If the user also changed his SIP address, then there is an extra step where you need to edit the file called DocItem in the zip file before launching the command to update.

  1. Open the zip file created
  2. Extract the file DocItemSet.xml
  3. Open it with text editor and replace any occurence of the old SIP address with the new one then save it.
  4. Replace the file previously edited in the zip file and launch the update.

LYNC SKYPE FOR BUSINESS – EWS Not Deployed

Hello,

Having the “EWS not deployed” issue can cause those issues :

  • Unable to change your profile picture in Exchange
  • Unable to get your voicemail
  • Unable to get your conversation history
  • Unable create contacts in Exchange (unified contact store)

EWSNotDeployed

If you are having this issue, try the following things :

  • Try to get your Exchange autodiscover xml with your browser (usually something like : “https://autodiscover.SMTPdomain.com/autodiscover/autodiscover.xml”)
  • If you can get the xml content without getting an Exchange form authentication, you are good with autodiscover. If you are getting a form, change the setting in your Exchange organization or remove the pre-auth in your TMG rule (external access).
  • Try to access your Exchange web services with your browser (usually something like : “https://EXCHANGE_SERVER_HOSTNAME/EWS/Exchange.asmx”)
  • If you are getting a prompt for authentication, you are good. If you are getting a form then same thing as autodiscover, change the setting in your Exchange organization or remove the pre-auth in your TMG rule (external access).

Indeed, when starting your Lync or Skype for Business client, in order to retrieve the EWS URL it is launching an autodiscover request based on your primary SMTP address which is getting thanks to in-band provisioning process.

Skype For Business federation trouble with partner on Skype for Business Online

Hi all,

A user reported that when he tried to get the presence and chat with a partner which is using Skype For Business Online, he couldn’t get the presence and had an error when start to chat.

Whereas the partner can get the presence and initiate an IM with him…

We finally found that as we also got an Online Skype For Business with our SIP domain despite no records target it and no hybrid configuration as been setup, the list of allowed domains need to be the same between the on-premise environment and the online one.

So if you are in the same situation as mine, which is sharing the same SIP domains between on-premise and online tenant, with or without hybrid configuration; you have to allow the same domains for federation in order that you get no issue.

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