Office 365 E5 Suite
Microsoft latest Enterprise Suite for Office 365 is packed full of some great new solutions around communication, analytics, and security.
Included in E5 on the UC front is PSTN Conferencing so people can joine a Skype for Business meeting over landlines or mobile phones. You also get Cloud PBX.
PSTN calling is not included in E5 but there's an option to purchase it as an add-on for $24/user/month.
Microsoft has included some advanced analytics as well in the form of Power BI and Delve Analytics. If you haven't already checked these out they're impressive. I highly recommend you take a look. I've included links in the resources below for more information.
E5 will include in-place, Advanced eDiscovery and advanced security and threat protection to help protect against malware and viruses as well as better zero-day protection to safegaurd messaging.
Microsoft has also added Customer Lockbox, which allows you to control how a Microsoft support engineer accesses your data. I think this is a great new feature.
Like many other features, not all of this is only available in the E5 suite so you can piece together your own solution. In the resources I'll also link up to a comparison of the E Suites so you can see how they differ and which might be best for your organization.
Resources:
Power BI: https://powerbi.microsoft.com/en-us/
Delve Analytics: https://products.office.com/en-us/bus...
Office 365 Customer Lockbox: https://support.office.com/en-us/arti...
Office 365 Enterprise Suite Comparison: https://products.office.com/en-us/bus...