Every few days we get lync.exe ( with is Skype for Business 2015)using between 1 and 6 % for every user who is has the program running. It adds up to All 17 processors being used 100%. I have to terminate the process and then it is ok. I change the priority and Set the Affinity to say the last processors so Lync.exe is only using two of them, the server goes back to normal levels except the last two processors stay pegged at 100%. Looking at the performance tab the percentages don't all add up. There are 14 users each with 1 % now that have the two processors at 100%.
We are using only the basic license for most users which is having only the instant messenger activated. They can't video chat or share remote desktops.
We did have to open hundreds of ports on the Firewall to get it to work as a side note.
Auto Updates are controlled by an update server, it is a managed environment.
I have used Process Explorer and it confirms everything.
This is a Terminal Server with about 50 users.
This host is only 18 months old there is no way all the resources should get used up.
Any help would be greatly appreciated. It is up-to-date on patches and services packs.