SOLVED

Exchange Online - hide membership for Distribution Group

%3CLINGO-SUB%20id%3D%22lingo-sub-7806%22%20slang%3D%22en-US%22%3EExchange%20Online%20-%20hide%20membership%20for%20Distribution%20Group%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-7806%22%20slang%3D%22en-US%22%3E%3CP%3EIt%20works%20for%20AD%20(hideDLmembership)%20and%20unified%20groups%2FOffice365%20groups%20on%20cloud%20(HiddenGroupMembershipEnabled)%2C%20but%20didn't%20find%20how%20to%20do%20that%20for%20traditional%20DG%20for%20Exchange%20Online.%20Is%20it%20any%20way%20to%20do%20that%3F%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-228320%22%20slang%3D%22en-US%22%3ERe%3A%20Exchange%20Online%20-%20hide%20membership%20for%20Distribution%20Group%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-228320%22%20slang%3D%22en-US%22%3E%3CP%3EYou%20might%20be%20able%20to%20work%20around%20the%20inability%20to%20stop%20the%20expansion%20of%20a%20group.%20%26nbsp%3B%20I%20tried%20the%20following%20in%20my%20Exchange%20Online%20lab%20tenant%3A%3C%2FP%3E%0A%3COL%3E%0A%3CLI%3EI%20created%20a%20distribution%20group%20called%20dgHide%2C%20added%20members%20and%20selected%20the%20checkbox%20to%20hide%20the%20group%20from%20address%20lists.%3C%2FLI%3E%0A%3CLI%3EI%20then%20created%20a%20distribution%20group%20called%20dgUnHide.%20The%20only%20member%20I%20added%20to%20it%20was%20dgHide.%3C%2FLI%3E%0A%3CLI%3EEmail%20sent%20to%20dgUnHide%20was%20delivered%20to%20the%20members%20of%20dgHide.%3C%2FLI%3E%0A%3CLI%3EWhen%20I%20opened%20the%20email%20in%20Outlook%20clicking%20the%20%2B%20beside%20dgUnHide%20yielded%20an%20error%20message.%20Trying%20to%20view%20its%20properties%20and%20check%20the%20membership%20told%20me%20there%20were%20no%20members.%3C%2FLI%3E%0A%3C%2FOL%3E%0A%3CP%3EThanks%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%0A%3CP%3EChris%3C%2FP%3E%0A%3CP%3E%26nbsp%3B%3C%2FP%3E%3C%2FLINGO-BODY%3E%3CLINGO-SUB%20id%3D%22lingo-sub-7809%22%20slang%3D%22en-US%22%3ERe%3A%20Exchange%20Online%20-%20hide%20membership%20for%20Distribution%20Group%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-7809%22%20slang%3D%22en-US%22%3EYou%20can't%2C%3C%2FLINGO-BODY%3E
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MVP

It works for AD (hideDLmembership) and unified groups/Office365 groups on cloud (HiddenGroupMembershipEnabled), but didn't find how to do that for traditional DG for Exchange Online. Is it any way to do that?

2 Replies
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Best Response confirmed by Sergei Baklan (MVP)
Solution
You can't,
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You might be able to work around the inability to stop the expansion of a group.   I tried the following in my Exchange Online lab tenant:

  1. I created a distribution group called dgHide, added members and selected the checkbox to hide the group from address lists.
  2. I then created a distribution group called dgUnHide. The only member I added to it was dgHide.
  3. Email sent to dgUnHide was delivered to the members of dgHide.
  4. When I opened the email in Outlook clicking the + beside dgUnHide yielded an error message. Trying to view its properties and check the membership told me there were no members.

Thanks

 

Chris