Microsoft Skype for Business
Microsoft Skype for Business licensing on Server plus CAL, and the leftover on-prem SKU that is not Teams and not Exchange. This category is the Skype file, not Microsoft 365 and not the parent Microsoft true-up.
Microsoft 365 holds Teams and cloud seats. Exchange holds the mail SKU. Use this file when Skype for Business is still on the paper, including when you are exiting it.
A Final Reprieve: Microsoft Announces Paid Extended Security Updates for Exchange and Skype Servers
Microsoft has officially announced a paid Extended Security Update (ESU) program for Exchange Server 2016…