Reference:
https://docs.microsoft.com/en-us/microsoft-365/compliance/dlp-learn-about-dlp?view=o365-worldwide

Explanation
The first thing you need to do before you implement directory synchronization is to purchase a custom domain name. This could be the domain name that you use in your on-premise Active Directory if it's a routable domain name, for example, contoso.com.
If you use a non-routable domain name in your Active Directory, for example contoso.local, you'll need to add the routable domain name as a UPN suffix in Active Directory.
Incorrect:
Not C: No need to rename the Active Directory forest. As we use a non-routable domain name contoso.local, we just need to add the routable domain name as a UPN suffix in Active Directory.
Reference:
https://docs.microsoft.com/en-us/office365/enterprise/set-up-directory-synchronization

Explanation
By default, all Global Admins receive the email. Any newly created Global Admins, Security Readers or Security Administrators will automatically be added to the recipients list.

Box 1: Connect-MgGraph
Assign Microsoft 365 licenses to user accounts with PowerShell
Use the Microsoft Graph PowerShell SDK
First, connect to your Microsoft 365 tenant.
Assigning and removing licenses for a user requires the User.ReadWrite.All permission scope or one of the other permissions listed in the 'Assign license' Microsoft Graph API reference page.
The Organization.Read.All permission scope is required to read the licenses available in the tenant.
Connect-MgGraph -Scopes User.ReadWrite.All, Organization.Read.All
Box 2: Get-MgSubscribedSku
Run the Get-MgSubscribedSku command to view the available licensing plans and the number of available licenses in each plan in your organization. The number of available licenses in each plan is ActiveUnits - WarningUnits - ConsumedUnits.
Box 3: Set-MgUserLicense
Assigning licenses to user accounts
To assign a license to a user, use the following command in PowerShell.
Set-MgUserLicense -UserId $userUPN -AddLicenses @{SkuId = "<SkuId>"} -RemoveLicenses @() This example assigns a license from the SPE_E5 (Microsoft 365 E5) licensing plan to the unlicensed user [email protected]:
$e5Sku = Get-MgSubscribedSku -All | Where SkuPartNumber -eq 'SPE_E5'
Set-MgUserLicense -UserId "[email protected]" -AddLicenses @{SkuId = $e5Sku.SkuId}
-RemoveLicenses @()
Reference:
https://learn.microsoft.com/en-us/microsoft-365/enterprise/assign-licenses-to-user-accounts-with-microsoft-365-