Skype for Business on-premises - on-prem or O365 accounts?
I am looking to roll out the Skype for business in a small organization. Not looking for PSTN or PBX at this time, just the chatting and conferencing.
We have volume licensing, which I think includes Skype for Business Server. We also have O365 accounts (free licenses) that inludes the basic Skype for Business.
What I'm unsure of is if I should deploy the Skype for Business client on-premises and instruct people to login with their O365 accounts, or deploy a S4B on-premises server and setup pass-through authentication.
While I use AD Sync for on-prem AD and O365, I don't think the fact that their AD UPN logins match their O365 logins will mean automatic/pass-through authentication for the Skype client, so I'm worried about the end-user inconvenience factor on that approach.
We do have Microsoft Exchange server on-prem where their mailboxes would be, so I'm wondering if on-prem Skype server makes more sense in that regard.
Just not sure what is better to use. At this time I only recommend they install the O365 Office 2016 Suite, which include Skype, onto their personal computers only.
There's an article here "Deploy the Skype for Business client in Office 365
" but I'm not sure if that's recommended for on-prem, and if it uses up a licenses for the users, taking away from their personal license count.