Does this meet the goal?

Overview
General Overview
Contoso, Ltd. is a manufacturing company that has 500 employees. The company has sales, marketing, research, and accounting departments.
Contoso recently acquired another company named A. Datum Corporation, which has 100 users with mailboxes hosted on a third-party, non-Microsoft Exchange Server platform.
Physical Locations
Contoso has two offices. One office is located in New York and the other office is located in London.
The offices connect to each other by using a WAN link. Each office also connects directly to the Internet.
Existing Environment
Active Directory
The network contains an Active Directory forest named contoso.com. The forest contains a single domain. All domain controllers run Windows Server 2008 R2.
Each office contains five domain controllers. Each office is configured as an Active Directory site.

Office 365 Subscription
Contoso recently purchased an Office 365 subscription and began using Exchange Online, SharePoint Online, and Skype for Business Online.
All Office 365 identities are managed in the cloud.
Current Business Model
Users in the accounting department have access to Windows by using Remote Desktop Services (RDS). All client applications, including Office, are made available through Remote Desktop sessions.
Users in the marketing department frequently change their computer and must reinstall Office.
Users in the research department deal with highly sensitive patents; therefore, they do not have access to the
Internet from their computer.
Problem Statements
Contoso identifies the following issues on the network:
Users who started using Skype for Business Online for instant messaging report that they receive increased amounts of unsolicited commercial instant messages from a domain named fabrikam.com.
A new employee named User1 reports that this name was misspelled when his account was initially created, which has resulted in an incorrect user sign-in SIP address in Skype for Business Online.
Mobile Device Mailbox Policies
You have the following mobile device mailbox policies in Office 365.

Requirements
Business goals
Contoso plans to upgrade to Office 2016 during the next six months.
As much as possible, Contoso plans to minimize the costs associated with purchasing hardware and software.
Planned Changes

Contoso plans to implement the following changes on the network:
The A. Datum mailboxes will be migrated to the Exchange Online tenant of Contoso by using the IMAP migration method.
The executive management at Contoso wants to prevent users from accessing their Exchange Online mailbox by using Outlook on the web.
As a part of the A. Datum acquisition, some managers in the New York office will receive a new primary
SMTP address. The current primary SMTP addresses of the managers must be demoted to secondary addresses.
The manager of a user named User2 in the accounting department requests a new email address of [email protected] for the user. All new email messages sent by User2 must come from the new address.
User2 must still be able to receive messages by using the current address of [email protected].
Technical Requirements
Contoso identifies the following technical requirements:
The amount of time required to install Office on the marketing department computers must be minimized.
The computers of the users in the sales department must have only the 64-bit version of Office 365 ProPlus installed.
All Exchange Online mailbox data must be retained for 18 months (540 days) and then moved to a user’s archive mailbox.
The legal department requests that only items in the mailbox of a user named User5 that were sent or received between July and November of last year be preserved for 540 days.
The legal department requests that all mailbox items in the organization that have the keyword ProjectX be placed on hold for 180 days from the time they were received or created.
If an In-Place Hold is configured for a user, the For compliance, turn off non-archived features Skype for
Business Online option must be enabled. Users must only be notified that these features will be disabled temporarily while the In-Place Hold is in effect.
Contoso plans to introduce a new mobile device mailbox policy by running the New-
MobileDeviceMailboxPolicy-Name “Unrestricted”-PasswordEnabled $true -AlphanumericPasswordRequired
$true -PasswordRecoveryEnabled $true -IsDefault $true-AttachmentsEnabled $true -AllowStorageCard
$true command

You need to recommend a solution to meet the technical requirement for mailbox data retention.
Solution: Create a retention policy tag and add the tag to a new retention policy. Set the retention policy as the default policy.
Does this meet the goal?

A.
Yes

B.
No

Explanation:

Assigning a retention policy that includes a retention tag will prevent users from changing the retention period.

References: https://technet.microsoft.com/en-us/library/dd297955(v=exchg.160).aspx#RT