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

[mdparkinson]

Added Light box and alt text

[learn-build-service-prod]

Learn Build status updates of commit 921ace9:

💡 Validation status: suggestions

File	Status	Preview URL	Details
microsoft-365/security/defender/microsoft-365-security-center-mdo.md	💡Suggestion		Details

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

• Line 69, Column 1: [Suggestion: duplicate-alt-text - See documentation] Alt text 'image' is duplicated. Within an article, alt text must be unique.
• Line 74, Column 1: [Suggestion: duplicate-alt-text - See documentation] Alt text 'image' is duplicated. Within an article, alt text must be unique.
• Line 84, Column 1: [Suggestion: duplicate-alt-text - See documentation] Alt text 'image' is duplicated. Within an article, alt text must be unique.
• Line 117, Column 1: [Suggestion: duplicate-alt-text - See documentation] Alt text 'image' is duplicated. Within an article, alt text must be unique.
• Line 128, Column 1: [Suggestion: duplicate-alt-text - See documentation] Alt text 'image' is duplicated. Within an article, alt text must be unique.

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[learn-build-service-prod]

Learn Build status updates of commit 7595671:

❌ Validation status: errors

Please follow instructions here which may help to resolve issue.

File	Status	Preview URL	Details
	❌Error		Details

• [Error: CannotMergeCommit] Cannot merge commit 759567127b1edb2844ac7974e5dd6796f6c9c7ab in branch patch-1 of repository https://github.com/mdparkinson/microsoft-365-docs into branch public (commit c0f57f548a001b07506ed14c75687fcdb6a2e145). Please follow this documentation: https://help.github.com/articles/resolving-a-merge-conflict-using-the-command-line/ to use git.exe to resolve you content conflicts locally and then push to remote.

For more details, please refer to the build report.

Note: Your PR may contain errors or warnings or suggestions unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.