Skype for Business does not do well in a multiple monitor configuration where the monitors have different DPIs. I am assuming it uses system DPI awareness rather than per-monitor, which was added in Windows 8.1. (See https://msdn.microsoft.com/en-us/library/windows/desktop/dn469266(v=vs.85).aspx)

The problem is that, depending on when I log in, it either will be INSCRUTABLY SMALL on my laptop high DPI monitor or COMICALLY GARGANTUAN on my standard DPI monitor.

I expect more from flagship Microsoft products. This is a pretty basic thing to get right. Should be a must-be in the Kano model of PM. :)

When a user is in a meeting, messages are blocked... which is fine up to a point. The messages should be either queued or just delivered without appearing a pop-up/notification. When the user leaves the meeting, then he would get a notification.
This way, the conversation would not be lost.

How can I change spell check from swedish to english?

Being able to integrate our bitmoji profile with skype for business :)

a "No Way" emoji

Enable Screen Sharing for the iOS Skype for Business App for the iPad

Please allow Skype for Business users to share their screen with consumer Skype users. Many people use their personal Skype account for business activities and it's a real limitation of SfB to not be able to share a screen with them.

It would be nice if in the Auto-Attendant function we could redirect calls toward a voicemail attached to a shared mailbox.

Lot of wastage of screen real estate which is an important factor for people working on small screen laptops like me.
1. Call controls at the bottom can be merged next to the contact name.
2. Space between each message can be reduced and default font can be improved
3. Time stamp can be merged below the contact icon
4. All fonts are too small to read.. definite recipe to get blind or eye strain

make more emojis

Have a push to talk option for Skype for Business audio meetings. This would allow people to chew/drink without the entire meeting full of people hearing it.

Likewise add a key mapping feature for this option. This way any keyboard key could be used to toggle talk on and off. Talk would be off by default and would be toggled on with the keyboard key. A double tap could lock the talk feature on or off depending on it's previous state.

I would like to have the Skype for Business iOS & Android app with CarPlay / Android Auto functionality. To ensure a safe driving experience.

You have added the app to the Volvo 90-series, which makes the business case for CarPlay / Android Auto even more compelling, you will reach an even bigger audience with these additions.

I should not get a notification everyone I mute and unmute myself. It's so annoying. I cannot see the presentation or other things on my screen and have to force the notification away.

Ability to export Skype contacts and import to Skype for Business.

The file attachment option is not available for Skype for Business in Mac 2016. We need this capability so we can send files in Skype.

The alert feature is not very easy to configure. I'd like to see an alert system that can:
1. Stay on top of your screen until dismissed (currently, it minimizes to the task bar).
and
2. Break through the sleep function (if we are in a meeting/conversation and our computer goes to sleep, we miss front-desk alerts in our office).