Author: Byron Spurlock

Skype 2015 and 2019 Calling Number Translation

Skype Server 2015 and 2019 provide a way for Skype engineers and telephony administrators to manipulate call routing options. Calling number translation brings about a change that enables the Skype calling party to call the called party and display a number to be defined by a translation rule in the Skype dial plan to the called party representing the caller ID. A bit confusing I’m sure but I will...

Determining How Many Front-End Servers to Deploy in Skype for Business Server 2015

I figured it was time to update this article to reflect Skype for Business Server2015, from the previous Lync Server 2013 version. For those that would like to reference the previous article I wrote, you can find it here Determining How Many Front-End Servers to Deploy in Lync Server 2013. Through many deployments of Lync Server 2013 and newly released Skype for Business Server 2015 the calculatio...

Skype for Business Server 2019 Capacity Planning (Mediation Servers)

Mediation servers in S4B server 2015 supports between 1100 – 1500 users for Mediation server in the pool. Now S4B server 2019 that number is up to 2000 users per Mediation server. So in a Mediation pool that number has increased exponentially from the previous version; approx. 500 users per server now. When planning out deployments that require Mediation server roles such as Enterprise voice...

Skype for Business 2015 Conferencing Attendant Application

Through many years of delivering training on Microsoft Unified Communications products such as Office Communication Server (OCS), Lync Server 2010 and 2013 and now Skype Business server 2015,  I can count on a single hand how many times that I have run into an issue with the conference attendant application. However, I feel the need to explain how knowing what it is will greatly benefit you going ...

Skype for Business Server 2019 Capacity Planning for Front End Servers

Front End servers S4B server 2019 offers some new sizing numbers compared to S4B server 2015. What we are used to in S4B server 2015 is the max capacity for users in a pool being 80k consisting of 12 Front End servers. For S4B server 2019, the limit has increased to 106k users on 16 Front End servers. So that means the largest number of Front End servers we can now have in a pool is 16. So how doe...

Skype For Business Server 2015 Conferencing Limits

There have been many discussions within the Lync community regarding how many conferences Lync Server 2013 on-premise can support and \ or handle. Ironically these are two different topics in their own rights with regards to supported and what will technically work especially with the adjusted supported number of users per Lync 2013 Front-End server (which is 6660 users, if you didn’t know). In th...

Skype for Business 2015 – Confirmation of Pool Failover and Failback

One of the things during the midst of either a disaster recovery exercise or performing the real thing is confirmation if you have truly failed over and / or failed back.   Running the cmdlet Get-CsUserPoolinfo username does not really tell you, that you have failed over and or failed back. In addition, once you have run the Invoke-CsPoolFailover and Invoke-CsPoolFailback cmdlets you can dig aroun...

Skype Business Server 2015: Difference Between Active and Concurrent Users

There are two key words when working with Skype for Business server 2015 that you should be aware of and those are: Active and Concurrent. These particular words will come up quite a bit when you are working with design, capacity planning, or troubleshooting an issue. At the end of the day, regardless of the scenario you are working with, its important to understand what these words mean and how t...

Skype for Business Server 2015 Codecs

Skype for Business Server 2015 (S4BS) has numerous codecs that can be leveraged in different types of communication depending on the workload that the end users are engaged with. Everything from peer-to- peer calls to conference calls leverage various codecs ranging from G.711 to Siren.  Depending on the type of  codec that is leveraged, you can end up changing your S4BS design infrastructure and ...

How Many Skype Front-End Servers Can I Reboot in a “Routing Group” Quorum?

The routing group quorum is a  particularly interesting one because its what is used to decide if a user will see the message “Limited Functionality” message on their Skype client when a pool failover is “NOT” taking place.   We can use the example that we have 12 Front – End servers in a pool.    The fact that our user routing group could actually exist on any three of the twelve Front-End server...

How Many Front-End servers can I reboot – “Pool” Quorum?

With the presence of Windows fabric used in Skype for Business server 2015 in relation to pool quorum and the existence of routing group quorums, we have to be careful about how many Front-End servers are rebooted at the same time as to not affect the quorum on any of them. Here we’ll take a look at both Pool and Routing Group quorum and areas to take into consideration when reboots are requ...

Skype for Business 2015 – Even or Odd Number of Front End servers

Lync server 2013 started the concept of needing a minimum of three Front End (FE) servers to make a pool and routing group quorum. Over the course of versions from Lync 2013 to Skype 2015, stories have changed (apparently), not really quite sure why.  I have heard talks of needing to have an odd number of servers in a Lync 2013 or Skype environment, which is not true.     The specific need to have...