Office 365 Enterprise

Business Emails with 50 GB mailbox and custom email domain address
Online conferencing for up to 10,000 people
1TB of File Storge and Sharing with Cloud Storage with OneDrive for Business
Office Online
Host unlimited HD video conferencing meetings with up to 250 people Tooltip about HD calling requirements
Host meetings for up to 10,000 people with Skype Meeting Broadcast
Unlimited Number of Users Allowed
FastTrack deployment support with purchase of 50+ seats at no extra cost
24/7 phone and web support

Business email hosting not included
Desktop versions of Office 2016 applications Outlook, Word, Excel, PowerPoint, and OneNote, plus Access and Publisher for PC only Tooltip about current Office versions
Web versions of Word, Excel, and PowerPoint
One license covers 5 phones, 5 tablets, and 5 PCs or Macs per user Tooltip about operating system requirements
File storage and sharing with 1 TB OneDrive storage
Skype for Business client available for PC and Mac; Skype for Business service not included
Maximum number of users - UNLIMITED
FastTrack deployment support with purchase of 50+ seats at no extra cost
24/7 phone and web support

Word, Excel, PowerPoint, etc. on 5 computers, 5 tablets and 5 phones
Business Emails
Online conferencing
1TB of Cloud Storage
Office Online
Email hosting with 100 GB mailbox and custom email domain address
Desktop versions of Office 2016 applications, Outlook, Word, Excel, PowerPoint, and OneNote, plus Access and Publisher for PC only Tooltip about current Office versions
Web versions of Outlook, Word, Excel, and PowerPoint
One license covers 5 phones, 5 tablets, and 5 PCs or Macs per user
File storage and sharing with unlimited OneDrive storage
Inform and engage with communication sites and team sites throughout your intranet using SharePoint
Host online and video conferencing meetings for up to 250 people Tooltip about HD calling requirements
Host meetings for up to 10,000 people with Skype Meeting Broadcast
Get a hub for teamwork with Microsoft Teams
Unlimited Number of User Allowed
FastTrack deployment support with purchase of 50+ seats at no extra cost
24/7 phone and web support

DNS Cluster for Office 365 & Exchange
Managed DNS on different NOCs
Geographically Dispersed Network
Primary & Slave DNS redundant zone
Managed Support for DNS for Office365
For customers running Office 365, DNS cluster can provide a higher level of redundancy and availability.