AnotherUCBlog > Exchange, S4B, O365

Share my findings in the Microsoft unified communication world


August 2016

LYNC/SKYPE FOR BUSINESS – Fail to escalate IM conversation to Microsoft Whiteboard sharing or Microsoft PowerPoint sharing session with a federated user

Hi Guys,

I have go a lot of things to say this week !

I had a new issue corrected thanks to a great MS Engineer ! We were having an error when trying to share a PowerPoint file with a federated user, this one was going to the lobby for a minute and then it failed. See below :


Again thanks to this great MS Engineer, we found that it was due to this known issue : and indeed we were using the Lync 2013 client (or Skype for Business 2015 which is Lync 2013 with SFB UI)

So after launching the following commands :

Get-CsConferencingPolicy | Set-csconferencingpolicy -AllowAnonymousParticipantsInMeetings $true -AllowFederatedParticipantJoinAsSameEnterprise $true

Set-CsAccessEdgeConfiguration -AllowAnonymousUsers $true

All was working fine !

Enjoy !!!

LYNC/SKYPE FOR BUSINESS – Desktop sharing not working with federated user

Hello folks,

It has been a while I haven’t write something ! Anyway, I had an issue some weeks ago on a fresh Skype for Business environment. We were having a “Network error” when trying to share a desktop in a peer to peer context with a federated user (Lync 2013 and Skype for Business 2015).

It was working between two internal users, between an internal and a remote user and between two remote user.

After looking at the firewall logs when performing test, we found that the federated user was trying to access the Audio/Video on port 5*****… You know the range 50000-59999 that should only be used for RTP traffic with OCS 2007 federated users ! So those ports are also used with Lync 2013 and Skype for Business federated users for RTP traffic.



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