Webmail disable "Display Distribution List"

Hi,

We need disable the "Display Distribution List" option in webmail is posssible? I try modify in COS and users the next options but not found 

[zextras@mailbox01 tmp]$ zmprov gc default |grep -i Distribution
zimbraFeatureDistributionListExpandMembersEnabled: FALSE
zimbraFeatureDistributionListFolderEnabled: FALSE

Thanks.