Update microsoft-365-security-center-mdo.md

Added Light box and alt text

Author: mdparkinson

microsoft-365/security/defender/microsoft-365-security-center-mdo.md

@@ -65,11 +65,13 @@ The left navigation, or quick launch bar, will look familiar. However, there are
 
 With the unified Microsoft 365 Defender solution, you can stitch together the threat signals and determine the full scope and impact of the threat, and how it's currently impacting the organization.
 
-![The Microsoft 365 Defender converged experience.](../../media/mdo-m36d-nav-collapsed.png)
+:::image type="content" source="../../media/mdo-m36d-nav-collapsed.png" alt-text="A screenshot of the left navigation pane of the M365 Defender portal." lightbox="../../media/mdo-m36d-nav-collapsed.png":::
+![image](https://github.com/MicrosoftDocs/microsoft-365-docs/assets/51235820/c88a4ba3-32da-4e0d-a243-ae4c4d781bde)
 
 Defender for Office 365 safeguards your organization against malicious threats posed by email messages, links (URLs), and collaboration tools.
 
-![The Defender for Office 365 portal.](../../media/mdo-m365d-nav.png)
+:::image type="content" source="../../media/mdo-m365d-nav.png" alt-text="A screenshot of Defender for Office 365 navigation pane options." lightbox="../../media/mdo-m365d-nav.png":::
+![image](https://github.com/MicrosoftDocs/microsoft-365-docs/assets/51235820/2a792c2c-9536-4db9-8551-67c111a0b42f)
 
 ### Incidents and alerts
 
@@ -78,7 +80,8 @@ Brings together incident and alert management across your email, devices, and id
 - [Learn more about Investigations](incidents-overview.md)
 - [Learn more about managing alerts](/windows/security/threat-protection/microsoft-defender-atp/review-alerts)
 
-![Alerts and Actions quick launch bar in the Microsoft 365 Defender portal.](../../media/m365d-incident-nav.png)
+:::image type="content" source="../../media/m365d-incident-nav.png" alt-text="A screenshot of the M365 Defender portal navigation pane emphasizing Incidents & alerts as well as Hunting capabilities." lightbox="../../media/m365d-incident-nav.png":::
+![image](https://github.com/MicrosoftDocs/microsoft-365-docs/assets/51235820/844c3592-fabd-4948-8883-405496574a90)
 
 ### Hunting
 
@@ -110,7 +113,8 @@ Learn more about how to [track and respond to emerging threats with threat analy
 
 Track and investigate threats to your users' email, track campaigns, and more. If you've used the Security & Compliance Center, this will be familiar.
 
-![The quick launch menu for Email & collab, on the left navigation pane in the Microsoft 365 Defender portal.](../../media/mdo-m365d-nav.png)
+:::image type="content" source="../../media/mdo-m365d-nav.png" alt-text="A screenshot of the left navigation pane of the M365 Defender portal focused on Email & collaboration." lightbox="../../media/mdo-m365d-nav.png":::
+![image](https://github.com/MicrosoftDocs/microsoft-365-docs/assets/51235820/604309d3-6d1c-4ce9-a4a7-3c2cac10b988)
 
 #### Email entity page
 
@@ -120,7 +124,8 @@ The [Email entity page](../office-365-security/mdo-email-entity-page.md) *unifie
 
 View reports, change your settings, and modify user roles.
 
-![The quick launch menu for Microsoft 365 Defender permissions and reporting, on the left navigation pane in the Microsoft 365 Defender portal.](../../media/m365d-settings-nav.png)
+:::image type="content" source="../../media/m365d-settings-nav.png" alt-text="A screenshot of the left navigation pane of the M365 Defender portal highlighting Access and Reports capabilities." lightbox="../../media/m365d-settings-nav.png":::
+![image](https://github.com/MicrosoftDocs/microsoft-365-docs/assets/51235820/6b179cd6-a3a8-40b7-a33b-c6116e826fa8)
 
 > [!NOTE]
 > DomainKeys Identified Mail (DKIM) ensures that destination email systems trust messages sent outbound from your custom domain.