office365 distribution group members

is it possble within Office365  to disallow the expansion of distribution group to identify individual member email address's
i am trying to limit who can send email to a distribution groups but if you expand the group ( in outlool click on the + sign next to the group) all members are listed in the To: line and email can be sent regardless of the delivery management restriction on the group
schuitkdsAsked:
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Todd NelsonConnect With a Mentor Systems EngineerCommented:
is it possble within Office365  to disallow the expansion of distribution group to identify individual member email address's

There is not.


However, if you are concerned who can send to the group, then it is possible to configure delivery management on the group to allow only specific senders.
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schuitkdsAuthor Commented:
yes i know that but if within outlook or OWA  the person expands the group to show the members ( which appear in the  To: line) the delivery management rule is bypassed and the email is sent to the individuall email address's/ members in the group.
so rather than send the email to the group, and then to they system sending to the members
a person could bypass the group and send directly to the members
how do i prevent that
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Todd NelsonConnect With a Mentor Systems EngineerCommented:
Unless you hide the distro from the GAL, the is no way to prevent users from looking and expanding the list.
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Todd NelsonSystems EngineerCommented:
Sufficient information provided for solution.
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