Skype for Business - Federation with Skype - S4B users always offline

Hi all,

Presence Federation between Skype and Skype for Business is working only one way. I can see the presence of the Skype User, but in Skype, the S4B User is always offline.

get-cspublicprovider shows the following:


Identity                         : Skype
Name                             : Skype
ProxyFqdn                        :
IconUrl                          :
NameDecorationDomain             :
NameDecorationRoutingDomain      :
NameDecorationExcludedDomainList :,,,
VerificationLevel                : AlwaysVerifiable
Enabled                          : True
EnableSkypeIdRouting             : True
EnableSkypeDirectorySearch       : True

In the Skype for Business Client the Settings are set to "allow everyone to contact me".

Any Ideas?

May 18th, 2015 6:46am


Would you elaborate the Edge Server (certificate, DNS records)?

1. Please check if the needed federate ports open such as port: Access/SIP(MTLS)/TCP/5061 (the link below is for Lync Server 2013 but similar for Skype for Business Server 2015):

2. Check the federate steps with the help of the link below:

3. Check Skype for Business Topology, make sure you enable sip federation already.

Best Regards,
Eason Huang

Free Windows Admin Tool Kit Click here and download it now
May 19th, 2015 7:52am

Have you ever found a solution?
(We have exactly the same problem....)


May 21st, 2015 3:39am

This topic is archived. No further replies will be accepted.

Other recent topics Other recent topics