See explanation below.
Explanation
Set group expiration
1. Open the Azure AD admin center with an account that is a global administrator in your Azure AD organization.
2. Select Groups, then select Expiration

3. On the Expiration page, you can:
* Set the group lifetime in days. You could select one of the preset values, or a custom value (should be
31 days or more).
* Specify an email address where the renewal and expiration notifications should be sent when a group has no owner.
* Select which Office 365 groups expire. You can set expiration for:
* All Office 365 groups
* A list of Selected Office 365 groups
* None to restrict expiration for all groups
Save your settings when you're done by selecting
Reference:
https://docs.microsoft.com/en-us/azure/active-directory/users-groups-roles/groups-lifecycle

See explanation below.
Explanation
1. In the admin center, select the Compliance
2. Select Classification > Sensitivity labels
3. Select Create a label, and when the warning appears, select
4. Enter a Label name, Tooltip, and
5. Turn on Encryption. Choose when you want to assign permissions, whether you want your users' access to the content to expire, and whether you want to allow offline access.
6. Select Assign permissions > Add these email addresses or domains
7. Enter an email address or domain name (such as Contoso.org). Select , and repeat for each email address or domain you want to add.
8. Select Choose permissions from preset or custom.
9. Use the drop-down list to select preset permissions, such as Reviewer or Viewer, or select Custom permissions. If you chose Custom, select the permissions from the list. Select Save >Save > Next.
10. Turn on Content marking, and choose the markings you want to use.
11. For each marking that you choose, select Customize text. Enter the text you want to appear on the document, and set the font and layout options. Select Save, and then repeat for any additional markings. Select Next.
12. Optionally, turn on Endpoint data loss prevention. Select Next.
13. Optionally, turn on Auto labeling. Add a condition. For example, under Detect content that contains, select Add a condition. Enter the condition; for example, add a condition that if passport, Social Security, or other sensitive information is detected, the label will be added. Select Next.
14. Review your settings, and select Create. Your label has been created. Repeat this process for any additional labels you want.
15. By default, labels appear in Office apps in this order: Confidential, Internal, and Public. To change the order, for each label, select More actions (the ellipsis), and then move the label up or down. Typically, permissions are listed from the lowest to highest level of permissions.
16. To add a sub-label to a label, select More actions, then Add sub level.
17. When finished, choose Publish labels> Choose labels to publish > Add. Select the labels you want to publish, and then select Add > Done
18. By default, the new label policy is applied to everyone. If you want to limit who the policy is applied to, select Choose users or groups > . Select who you want the policy to apply to, and then select Add > Done > Next.
19. If you want a default label for documents and email, select the label you want from the drop-down list.
Review the remaining settings, adjust as needed, and then select
20. Enter a Name and Description
21. Review your settings, then select
Reference:
https://support.office.com/en-us/article/create-and-manage-sensitivity-labels-2fb96b54-7dd2-4f0c-ac8d-170790d
https://docs.microsoft.com/en-us/microsoft-365/compliance/sensitivity-labels?view=o365-worldwide

Reference:
https://docs.microsoft.com/en-us/microsoft-365/compliance/audit-log-retention-policies?view=o365-worldwide

Topic 3, Contoso, Ltd
Overview
Contoso, Ltd. is a consulting company that has a main office in Montreal and three branch offices in Seattle, and New York.
The company has the offices shown in the following table.

Contoso has IT, human resources (HR), legal, marketing, and finance departments. Contoso uses Microsoft
365.
Existing Environment
Infrastructure
The network contains an Active Directory domain named contoso.com that is synced to a Microsoft Azure Active Directory (Azure AD) tenant. Password writeback is enabled.
The domain contains servers that run Windows Server 2016. The domain contains laptops and desktop computers that run Windows 10 Enterprise.
Each client computer has a single volume.
Each office connects to the Internet by using a NAT device. The offices have the IP addresses shown in the following table.

Named locations are defined in Azure AD as shown in the following table.

From the Multi-Factor Authentication page, an address space of 198.35.3.0/24 is defined in the trusted IPs list.
Azure Multi-Factor Authentication (MFA) is enabled for the users in the finance department.
The tenant contains the users shown in the following table.

The tenant contains the groups shown in the following table.

Customer Lockbox is enabled in Microsoft 365.
Microsoft Intune Configuration
The devices enrolled in Intune are configured as shown in the following table.

The device compliance policies in Intune are configured as shown in the following table.

The device compliance policies have the assignments shown in the following table.

The Mark devices with no compliance policy assigned as setting is set to Compliant.
Requirements
Technical Requirements
Contoso identifies the following technical requirements:
* Use the principle of least privilege
* Enable User1 to assign the Reports reader role to users
* Ensure that User6 approves Customer Lockbox requests as quickly as possible
* Ensure that User9 can implement Azure AD Privileged Identity Management

See explanation below.
Explanation
1. After signing in to the Microsoft 365 admin center, navigate to Threat management, choose Policy > Safe Links.
2. In the Policies that apply to the entire organization section, select Default, and then choose Edit (the Edit button resembles a pencil).

3. In the Block the following URLs section, add the malware.contoso.com link.
4. In the Settings that apply to content except email section, select all the options.
5. Choose Save.
Reference:
https://docs.microsoft.com/en-us/microsoft-365/security/office-365-security/set-up-atp-safe-links-policies?view=