Why in the Windows Outlook (new) App, my outlook.com acccount has a two people icon next to?

[Microsoft Windows]

I recently noticed that within the Windows Outlook (new) App, my outlook.com email that I have configured appears with a two-person icon next to it. This does not happen with the third-party email accounts that I have configured such as Gmail or Yahoo. Is this configuration normal or is my mailbox being shared with unknown people? How do I get rid of this? I add an image to visualize it:Microsoft Outlook version: 1.2025.219.400 (Production) Client version: 20250221002.19 WebView2 version: 133.0.3065.82 (Stable)

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