I was watching this video about "Office 365 Groups" Office 365 Groups: Quick tour of new user and admin experiences.

But i am not sure what are the main differences between creating "Office 365 Groups" and between creating SharePoint sites (such as Team sites and adding the related users inside the site)?? are "Office 365 Groups" and SharePoint sites suppose to replace each other? or they serve different purpose and different business needs?


2 Answers 2


They are different.

Office 365 Groups is a service that works with the Office 365 tools you use already.

When you create a modern team site in Office 365, a corresponding Office 365 Group is automatically created and any users you add to your modern team site get added to the Office 365 Group. Members added to the Office 365 group associated with the site are automatically added to the site members group.

For more information about Office 365 Groups, see Learn about Office 365 groups.

For more information about a team site in SharePoint Online, see Create a team site in SharePoint Online.

  • thanks for your reply. I already check these links, but they made me confused... mainly about these 2 main points .1)First Point, inside this video youtube.com/watch?v=-SgQ1_ATw9s they created a new "Office 365 Group", which actually create a new site similar to a SharePoint site (calendar, news feed, documents, upload videos and documents) so what is the main difference between what they did inside the youtube.com/watch?v=-SgQ1_ATw9s and between creating a normal team site in SharePoint?
    – John John
    Commented Jan 30, 2018 at 2:49
  • 2) second point which confused me also,is that inside this link support.office.com/en-us/article/… they talk about how to create Office 365 groups, but they mentioned that one way of creating "Office 365 groups" is to create a SharePoint team site support.office.com/en-us/article/… ,, is this correct ?
    – John John
    Commented Jan 30, 2018 at 2:51
  • When we create a modern team site (not classic site) in Office 365, a corresponding Office 365 Group is automatically created. We can create Office 365 Groups from a variety of tools including Outlook, Outlook on the web, Outlook Mobile, SharePoint, Planner, Teams and more. Commented Jan 30, 2018 at 5:26
  • 1
    Also keep in mind that there are differences in creating a “modern” Team Site (which creates an O365 group) and creating a site in SharePoint under the “root” site or under another site. Modern Team Sites are created as Site Collections (but are not listed as Site Collections in the Admin tool) and do not inherit anything from the root site like permissions, content types, etc.
    – mannaggia
    Commented Jan 30, 2018 at 12:00
  • 1
    No, one site. Just a different view of it.
    – mannaggia
    Commented Feb 1, 2018 at 13:45

@john G, no it will not create two sites - it's the same site. If you create a modern Team Site in SharePoint Online, it will create an O365 group, and if you use the Files tab in Groups and upload a file, it will appear in the Documents library in the Team Site (and vice versa).

  • thanks for the reply... so in this case i will have 2 sites; one for the groups itself (with file tabs, and other tabs), while the other is the modern team site with document library?? is this correct ?. For example in this video youtube.com/watch?v=-SgQ1_ATw9s they create something outside sharepoint (they create a group inside office 365) , so have this operation create a modern team site inside sharepoint? or the site that have been created inside the video (the site with tabs such as conversation, calendar, and so on), is actually a modern sharepoint site?
    – John John
    Commented Jan 31, 2018 at 11:14

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