In some cases you need to hide group members form Outlook or OWA users .
you can hide the members by set “true” value to hideDLMembership Property.
You can change the property with the GUI or by using POWERSHELL.
For Example, if you have a group with name – “SecGroup” you can set the value by :
GUI
Go directly (please don’t use “search” for group name) to group name (under the relevant OU) choose the Tab “Attribute Editor” and set hideDLMembership Property to “TRUE” .
POWERSHELL
run the command :
Get-ADGroup “SecGroup” -Properties hideDLMembership | Set-ADGroup -Add @{hideDLMembership=$true}
SHMUEL H.