I think this is where some issues are still being resolved. The ESX should only be presenting physical processors on a machine where SFB is installed.
The processors must not have NUMA complications, and Hyper threading should be disabled. The Ram must not be dynamic, and must be a minimum of 24GB of ram. The VHDX needs to be fully expanded, and should not be an remote disk- ISCSI disk. Let me first bulletize what the supported Lync Server would look like on ESX: With that said, let me break it down for you, as much as I can. I am a Lync Professional and I am telling you my honest experience over 7 years with Lync and Skype for Business. I don’t make that statement to support my own brand. I am a Microsoft Support Agent, so I do have a bias. Now I know I may take flack for that statement. I need to express in no uncertain terms, how vigilant you must be if you decide to Virtualize Lync or Skype for Business! While there may be some issues with Lync and Hyper-V, I am being honest, when I say that most of the virtual issues have been with VMware. What a coincidence! I had caught the same customer changing his resources myself! That was all it took. This was a very good route! As it turns out, The VMware agent caught the Virtual Machine with 4GB of ram!. As a series of chance activities, this customer ended up going to the VMware department, instead of Lync. I had some time to look at this case from a distance, after being very close to the situation for several weeks in a row. From having calls fail on Fridays, to having the Web sites fail on Wednesday, every week, for several weeks in a row. This article is written for a customer I have in a nearby nation, to the United States. I believe we are all moving to just Skype, but it would be nice if MS just rolled it all to just Skype! one word please! *Disclaimer: I use Lync and SFB and Skype for business, all to refer to the general term of Lync or Skype. Are you using the same hardware? If so, your problems have come from the past to haunt you. Many of you started at lync 2010 and are now on Skype for Business. TO being let me share an article that articulates what may of you have gone through to get to this point.
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