SPO - O365 - Licenses and Apps - Post1

MSFT keeps on updating the features/options very frequently. Licenses and Apps is bit confusing now a days. There are many related licenses & applications. 
For Ex: OneDrive, Microsoft Teams Site Collections, SharePoint Online apps under Office Enterprise E3 License.

Below are the TEST cases with licenses & applications combination.

TEST 1:  Enable Microsoft Teams app only.

Created a new user (Teams Test) with user (no administrator access) role (as shown below).

Enabled Office 365 Enterprise E3 (Developer) License.

Enabled Microsoft Teams App Only.

Login into https://www.office.com , you will see Only Teams icon. (Add-in appeared for enabling of Office Store).

Click on Teams, you will notice the below message for first time. By Clicking on "Get the Windows app", you can install Teams Windows app for Windows 7/10. If already installed, it will be initiated for login. By clicking on "Use the web app instead", will open the Teams in browser.

Was able to login thru Teams Windows app and Teams web app. Created a new Team (TeamsTest) with below selected options.

Microsoft Teams login thru Teams Windows app.

Microsoft Teams login thru Teams web app.

Click on Files tab in the Teams window. You will see options as shown below.

Click on "Open in SharePoint"

Teams is opened as SharePoint Online Site (as shown below). 

(Note: When new Team is created, a SharePoint Site collection get created in the back-end).

Conclusion 1: Enabling Office 365 Enterprise E3 (Developer) License and Microsoft Teams App, user was able to login into SharePoint Online Site related to specific Teams without any issues.

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TEST 2: Without changing any Licences and Apps (continuing as above), added the above test user to OneDrive access. SPac >> User profiles >> Manage User Permissions.

Login into https://www.office.com , you will see Only Teams icon. (Add-in appeared for enabling of Office Store). We don't see OneDrive icon.

Made up the OneDrive URL and tried, but failed.

Conclusion 2: Enabling Office 365 Enterprise E3 (Developer) License and Microsoft Teams App, user cannot login into OneDrive app.
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TEST 3: Without changing any Licences and Apps (continuing as above), added the users to Team Site Visitors group with Read access to SharePoint Online site (as shown below).

User was able to access the SharePoint Site (as shown below).

Conclusion 3: Enabling Office 365 Enterprise E3 (Developer) License and Microsoft Teams App, user was able to login into SharePoint Online site with providing permissions.
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Continuing with second part.....SPO - O365 - Licenses and Apps - Post2