The MailTip shows 200+ members in a DL but the DL actually have 4 members. Could anyone know how to fix?
What's the version of your Exchange server?
Is it only affecting this particular distribution list? Have you removed group members from this DL recently?
Please have a check in both Outlook and OWA and see if there is any difference.
It's also suggested to run the command below to verify the members included:
Get-DistributionGroupMember -Identity <DLName>
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