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I've been digging a way to disallow guest users from seen other members in the same O365 group. No luck so far. Is there any way to add guest members to a group and don't let them know about each other inclusion?

To clarify my point, I have an extranet site which has a documento library with custom permissions and I need to allow all my clients (external users/guests) to access this extranet site but not let them know about other clients allowed.

Thanks in advance.

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You can hide all members from each other using New-UnifiedGroup -HiddenGroupMembershipEnabled $true, though this cannot be set on an existing Group.

I would strongly suggest a re-architecture. Create a Group (thus SharePoint site) per client. This provides the separation you're after.

  • thanks! I'll try that out and let you know – Andre Morata Jul 23 at 19:06
  • mmm... Maybe it's not exactly what I'm looking for. Here's the definition of this switch extracted from MS Docs: _______ -HiddenGroupMembershipEnabled The HiddenGroupMembershipEnabled switch specifies whether to hide the members of the Office 365 Group from users who aren't members of the group. You don't need to specify a value with this switch. _______ I actually need to hide the members from the members. I mean, don't let the member to know who are the other members. – Andre Morata Jul 23 at 19:11
  • Per the docs, you can't enable that setting after creating the Group. it must be done via PoSh with the New- cmdlet. But I'd strongly suggest rethinking the architecture to prevent mistakes and data leakage. – Trevor Seward Jul 23 at 19:51
  • This does not actually help, because a member can open the share panel and type any name and "see" the other from the picker. – Andre Morata Aug 12 at 15:49
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    This is more or less the only option available. – Trevor Seward Aug 12 at 15:49

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