Error when modifying a mail enabled Universal Security Group. (196515)

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Title

Error when modifying a mail enabled Universal Security Group.
Description

On a mail-enabled Universal Security Group, when you check the box under Message Delivery Restrictions to enable "Require that all senders are authenticated", you get a popup error:
"Administration Policy returned and error. Members can't remove themselves from security groups. Please set the group to Closed for requests to leave."
Does not affect Universal Distribution Lists.
Resolution

Set the MemberDepartRestriction to closed for that distribution group.

set-distributiongroup <alias of group> -memberdepartrestriction closed