22Aug/18

Odd Cause Code 50 with Skype for Business Server

August 22, 2018Interop, Lync, Skype4BAudiocodes, Errors, PSTN CallingTrevor Miller

For all the grief that IT architects and engineers give the SIP RFC “standard” causing interoperability issues between different systems/vendors, I could argue that ISDN suffers from similar – although not quiteRead More…

22Jan/18

Retrieving Office365 IPs and URLs via PowerShell

January 22, 2018Exchange, Lync, Office365, Skype4B, TeamsAdministration, NetworkTrevor Miller

Full Disclosure I truly stink at scripting and rather dread it.  I knew early on in my career that programming was not a strength of mine, so I chose to gravitate towardsRead More…

15Jan/18

Transport Relays in Skype4B Online and Teams

January 15, 2018Lync, Office365, Skype4B, TeamsNetworkTrevor Miller

Despite the major announcements around Microsoft’s change to position Teams as the first-and-foremost UC solution in the portfolio over Skype4B, the other just-as-big-change was the announcement that the underlying network infrastructure usedRead More…

14Dec/16

Handling SIP OPTIONS Requests on Audiocodes SBCs

December 14, 2016Interop, Lync, Skype4BAdministration, Audiocodes, Session Border Controller, SIP TrunkingTrevor Miller

12/20/2016 – Updated to include alternate IP-to-IP Routing configuration SIP OPTIONS requests are a crucial piece of functionality for Lync/Skype4B deployments, but even so, OPTIONS requests are utilized within other Unified CommunicationsRead More…

16Aug/16

Using Lync Server 2013 Persistent Chat Whilst Blocking IM Capabilities

August 16, 2016Lync, Skype4BAdministration, Persistent ChatTrevor Miller

In the midst of a 2010 to 2013 migration, a requirement was proposed that was, well, one of those ‘head scratcher’ asks: “We are upgrading from Group Chat 2010 to Persistent Chat but we don’tRead More…

20Jun/16

The Curious Case of Lync Server 2013 CLS “Running” but not Actually Working

June 20, 2016Lync, Skype4BAdministration, Errors, SecurityTrevor Miller

This was one of those “ohhhh yeah…” moments – one of those issues that made complete sense once you were able to see root cause but one of those issues where youRead More…

23May/16

Dissecting a failed CMS Migration in Lync Server 2013 due to LRS Meeting Portal

May 23, 2016Lync, Skype4BCentral Management Store, Errors, MigrationTrevor Miller

Ah…CMS…the Centralized Management Store…  How important you are, yet so little the respect you are given.  I gaze upon your XML and bask in its glory…  The simplicity and elegance of yourRead More…

16May/16

‘Preliminary Primary FileShareName Parameter is Unusable’ with Lync Server 2013

May 16, 2016Lync, Skype4BErrors, LYSS, SBA, TopologyTrevor Miller

I’ve been working through a Lync Server 2010 to Lync Server 2013 migration as of recently, and the error below popped up after I upgraded an existing Lync Server 2010 SBA toRead More…

09May/16

Lync Server 2013 Front End Patch Installer Fails with Error 1603

May 9, 2016Lync, Skype4BErrors, Patching, Security, SQLTrevor Miller

Another day, another odd error.  Another trip into the deep, dark depths of Windows.  Another enlightening find that reminded me of the inter-dependency of Lync, Windows, and SQL Server. The error: Product:Read More…

02May/16

‘Gateway peer in inbound call is not found in topology document’ with Lync Server 2013

May 2, 2016Lync, Skype4BErrors, SBA, SIP Trunking, TopologyTrevor Miller

This issue was discovered during an SBA upgrade from Lync Server 2010 to Lync Server 2013.  While the issue does have a few random musings out on the Internet that seemed to be loosely-relatedRead More…