How can I efficiently check if a given email address is included in a distribution list in Microsoft Outlook OWA?

From what I can see, clicking on the distribution list in Microsoft Outlook OWA doesn’t give any efficient way to check if a given email address is included in a distribution list, since would have to go through the list of email addresses included in a distribution list (which is inconvenient if the distribution list contains many email addresses):

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How can I efficiently check if a given email address is included in a distribution list in Microsoft Outlook OWA?