Associate a business unit with an Azure AD security group

Create an Azure AD security group for each business unit and assign the respective business unit security role to each group team.

1. Create a user in Microsoft Azure AD
2. Login to portal.office.com.
3. Navigate to Admin->Teams&groups->Security tab
4. Click on Add a Group, Give a group name and description.
5. Click on Create Group
6.  The group is now created.
7. 

   Navigate to admin.powerplatform.com 

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11. Now, all users who belong to this security group will have access to this Business Unit with assigned security role.