Exchange Online – Microsoft email, doing more on every device, protecting business information exchange, simplifying internal compliance.
Sharepoint Online – Microsoft Platform, you can buy SharePoint on the cloud as a standalone package or as part of the Office 365 suite where you can also access Exchange, Skype for Business, Office client applications and other web application.
OneDrive – Store everything in the cloud, sync backups on all devices and easily find them.
Yammer – A true Co-Working online. Allows you to easily assemble your workgroup, easily connect with each other as an internal social network of your business.
Skype for Business – Professional online meeting with all-in-one audio and video calling.