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versions of its software solutions (Exchange, SharePoint, etc.). It is a way for Microsoft to bring together many of its enterprise offerings into a convenient wrapper that businesses can subscribe to. In O365, there are many different tiers of core subscription licenses that usually build on top of each other, and there are a plethora of add-on licenses to let a business pick and choose what additional features they want. Subscriptions come in three broad categories: Home, Business, and Enterprise.

      You might see Office 365 and Microsoft 365 referenced together; it can get confusing, as Microsoft is rebranding some of the non-Enterprise plans from “Office” to “Microsoft.” The difference used to be that the “Office” or “O” plans contained Office software or Office services (Exchange, SharePoint, Skype for Business, Teams, etc.), and the “Microsoft” or “M” plans took the included offerings further, incorporating Windows 10 Enterprise licenses as well as the Enterprise Mobility + Security (EMS) tools. For our purposes, when looking at the Enterprise plans, consider O365 plans as a subset of M365.

      Teams is provided only as a cloud service, meaning that there is no edition that you can install on your own servers. It is generally provided as part of O365 subscriptions because it relies heavily on the rest of the Microsoft cloud offerings for its core functionality. (That said, Microsoft has released a cut-down version of Teams for free, but that is not something to consider for this exam. See www.microsoft.com/en-us/microsoft-365/microsoft-teams/free for more information.)

      These integration points are as follows:

       Azure ADHandles authentication and identity verificationProvides O365 Security Groups for TeamsAlso controls guest access

       OneDrive for BusinessStores files a user uploads in chat

       SharePoint OnlineStores files/content uploaded into a channel

       Exchange OnlineStores channel messages (hidden in Group mailboxes)Stores user chats (hidden in User mailboxes)Calendar for scheduling Teams meetings

       Microsoft StreamStores recordings of meetings (at the time of writing, an upcoming update moves this into SharePoint Online)

      You can find more information about the various Microsoft Teams architecture at docs.microsoft.com/en-us/MicrosoftTeams/teams-architecture-solutions-posters.

If you want to purchase O365, you have the following choices. (Note that all the information in the following tables, including prices, is correct at the time of writing but is subject to change as Microsoft does like to tinker with its licensing plans.)

      Home User Plans

Home subscriptions are targeted at consumers and include Office applications as well as some cloud storage (OneDrive consumer: 1TB) and 60 minutes of Skype calling. See Table 1.2.

TABLE 1.2 Microsoft 365 for Home Subscriptions

Subscription	RRP (per Month)	Office Desktop	Cloud Services	Includes Teams?	Notes
Microsoft 365 Family	$9.99	Yes	OneDrive consumer (1TB storage) Skype consumer PSTN minutes	No	6 users
Microsoft 365 Personal	$6.99	Yes	OneDrive consumer (1TB storage) Skype consumer PSTN minutes	No	1 user

       www.microsoft.com/en-us/microsoft-365/buy/compare-all-microsoft-365-products

      These home user plans do not currently contain Teams; however, Microsoft is working on an edition of Teams for Home where you can share information with your family and close friends, but that isn't something you have to worry about for this exam or study guide. You can see more about that at www.microsoft.com/en-us/microsoft-365/microsoft-teams/teams-for-home.

      Small/Medium Business Plans

Business subscriptions are for small to medium-sized companies up to 300 users. Where Teams is included in these packages, there are some restrictions about the use of advanced features such as calling plans and live events, but this will be covered when we get to the relevant chapters. See Table 1.3.

TABLE 1.3 Microsoft 365 for Business Subscriptions

Subscription	RRP (per Month)	Office Desktop	Cloud Services	Includes Teams?	Notes
Microsoft 365 Business Basic	$5	No	Teams Exchange OneDrive for Business SharePoint	Yes (No live events)
Microsoft 365 Business Standard	$12.50	Yes	Teams Exchange OneDrive for Business SharePoint	Yes (No live events)
Microsoft 365 Business Premium	$20	Yes	Teams Exchange OneDrive for Business SharePoint InTune Azure Information Protection	Yes (No live events)	Includes device management and additional security features
Microsoft 365 Apps	$8.25	Yes	OneDrive for Business	No

       www.microsoft.com/en-us/microsoft-365/business/compare-all-microsoft-365-business-products

      Enterprise Plans

Finally, at the top end are the O365 enterprise plans. You will have probably seen these referred to as “E” plans, i.e., E3 or E5. There are variations of these plans for education, government, and nonprofit organizations. See Table 1.4. There are also add-on

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