Office 365 Groups

Office 365 Groups is a feature developed with collaboration in mind. It works with the Office 365 apps you use already so you can collaborate with your teammates when writing documents, creating spreadsheets, working on project plans, scheduling meetings, or sending email.

What’s the difference between an Office 365 group and a distribution list?

A distribution list is a set of email addresses. You can use the distribution list to send an email message or meeting invitation to all the addresses at once. An Office 365 group includes a distribution list but also includes a shared:

  • Inbox for group email communication
  • Calendar for scheduling group meetings and events
  • Library for storing and working on group files and folders
  • OneNote notebook for taking project and meeting notes
  • Planning tool for organizing and assigning tasks and getting updates on project progress

When you join a group, your email address is automatically added to the distribution list and you gain access to all group information. You don’t have to wait to see group email or view a shared document. You join, you have access to everything, from everywhere: in the cloud, on the desktop, or on a mobile device.

Check out this video to see Office 365 Groups in action.

Help and how-to

Get started
Start or join a group
Communicate and collaborate
Manage group details
Go mobile

Group size limitations

An Office 365 group can have multiple owners and include hundreds of members. But there are limits:

Maximum… Value
Owners per group 10
Groups a user can create 250
Number of members

More than 1,000

Users might notice delays when accessing the calendar and conversations in large groups

Written by Misha Hanin

Trusted Business & Technology Advisor, Solutions Managing Director & Senior Solutions Architect at iRangers International Inc. with more than 25 years of experience in the field of information technology, infrastructure analysis and design, implementing innovative and leading technologies for International companies around the globe in public and private sectors.

Over the years I was able to develop very strong technical and engineering skills which helped me to earn trusted advisor status with our clients. As one of the nearly 500 trained Microsoft Certified Masters (MCM) in The World (during 10 years existence of MCM program, just about 500 people in The World participated in this very intensive training), I have a winning track record in building and bringing projects to operational and measurable success.

I am honored to have been awarded Microsoft Most Valuable Professional (MVP). This award is given to "exceptional, independent community leaders who share their passion, technical expertise, and real-world knowledge of Microsoft products with others."