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Stewart Davies's avatar
Stewart Davies
Copper Contributor
Aug 04, 2016
Solved

Hide Group email from global address list

I have some o365 groups created though sds for classroom.   The groups are private but they appear in the global address list.   Is there a way to prevent this and hide them? 
exchange
groups
  • cfiessinger's avatar
    cfiessinger
    Aug 04, 2016

    Setwart you can do so via PowerShell: Set-UnifiedGroup -Id Group -HiddenFromAddressListsEnabled $True

Ali Fadavinia's avatar
Ali Fadavinia
Iron Contributor
Jan 29, 2021

cfiessinger I have a Office365 group mailbox, I checked the HiddenFromAddressListsEnabled proerty in powershell; it set to $True.


Also, I checked the Exchange Admin Center, it is checked mark.

 



Also, I let the GAL to be synced and downloaded in the Offline Address Book, but still this group mailbox show-up in the Address Book for Outlook.

Do you have any idea how I can fix this?

Thanks

cfiessinger's avatar
cfiessinger
Icon for Microsoft rankMicrosoft
Jan 29, 2021
Ali, not sure and my recommendation is to open a ticket with our support team so we can investigate further.
  • Ali Fadavinia's avatar
    Ali Fadavinia
    Iron Contributor
    Feb 04, 2021

    cfiessinger I thought to give an update here and express my thanks for the direction and advice.

    Problem was raised with Microsoft, their engineer did a great job, we worked along, ran diagnostics on their end that fixed the issue. So it was just a bad O365 Mailbox creation and/or the property 

    addresslistmembership was not being synced properly.

    All in all, that scripting command works like a charm if you needed to hide your O365 email address from GAL.

     

    Ali

    • SebCerazy's avatar
      SebCerazy
      Iron Contributor
      Apr 14, 2021

      In this uservoice:

      https://microsoftteams.uservoice.com/forums/555103-public/suggestions/18706228-prevent-team-from-showing-in-outlook-global-addres?page=1&per_page=20

       

      it states:

      Based on customer feedback, new Office 365 Groups generated as a result of creating a team in Microsoft Teams will no longer show in Outlook by default.

       

      Well... that was in 2018 & now in 2021, I still have O365 groups showing by default in Outlook when Teams are created.

       

      So what is the actual default (or is it something that needs to be set somewhere?)

       

      Seb

       

      edit

      Still no idea about the default, but I hide them (or unhide) with PS

       

      Connect-ExchangeOnline -UserPrincipalName email address removed for privacy reasons -ShowBanner:$false
$Groups = Get-UnifiedGroup -ResultSize Unlimited | ? {$_.PrimarySmtpAddress -like "Some_common_name_good_for_ie_teams_created_from_MIS*"}
Foreach ($Group in $Groups) {Set-UnifiedGroup -Identity $Group.Name -HiddenFromAddressListsEnabled $false}

       

  • Ali Fadavinia's avatar
    Ali Fadavinia
    Iron Contributor
    Jan 29, 2021

    cfiessinger 

    Thanks for the reply, and direction,

     

    I just created a Support Ticket with Microsoft

    It is very strange. As we have similar O365 MailBox groups and they get hidden with similar PS command or the UI one.

     

    But this one behaves differently.

     

    One thing I found a discrepancy though in properties, it was addresslistmembership property.

     

    Other O365 mailbox group has:

     

    Get-UnifiedGroup -Identity "ABC" | select -ExpandProperty addresslistmembership

    \All Recipients(VLV)

    \All Groups(VLV)

    \GroupMailboxes(VLV)

     

    but this one has much more extra:

    Get-UnifiedGroup -Identity "DEF" | select -ExpandProperty addresslistmembership

    \All Groups

    \Offline Global Address List

    \All Distribution Lists

    \Groups(VLV)

    \Default Global Address List

    \All Recipients(VLV)

    \GroupMailboxes(VLV)

    \All Groups(VLV)

    If I manually change the addressListMembership property and make it similar to the other ones that is working fine, does it help? does it have any wider impact that I should be aware of?

    Any thoughts?

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