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We are in a hybrid environment with our on-premise AD synced with Entra via AD Connect. Our email is strictly online as we have no on-prem exchange. I am unable to hide anyone from the global address book. I also dont have any of the exchange attributes for my on-prem users.
When I try to hide something from the address book, I just get a generic error, "Operation Failed". This goes for either user mailboxes or shared mailboxes.
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Give this a try, although do make note of any information you remove in case you need to revert
https://community.spiceworks.com/t/how-can-i-hide-active-directory-users-from-the-global-address-list/355034/7
Once done you will need to wait some time for the sync to happen. Also, keep in mind that the GAL doesnt update as quickly as most other ms services. could take a day or more
Thank you for the link, however, this did not work. The attribute "showinaddressbook" was already set to "no info".
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Hi @Shaun Healy,
Welcome to the Microsoft Q&A platform!
With permission, open the Synchronization Rule Editor and make sure the MsExchHideFromAddressLists property is included.
https://learn.microsoft.com/en-us/archive/msdn-technet-forums/8ef659e8-da58-4c5e-acad-2799f4b864c2
Run the following cmdlet:
Set-Mailbox -Identity ******@contoso.com -HiddenFromAddressListsEnabled $true
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Hi @Anonymous you can try the steps in https://learn.microsoft.com/en-us/exchange/troubleshoot/administration/changes-to-msexchangehiddenfromaddresslist-not-updated-against-recipient?source=recommendations.
If you don't see the exchange attributes, it's likely you need to extend AD schema by installing the Exchange Management Tools and you can the AD exchange attributes using PowerShell - https://learn.microsoft.com/en-us/exchange/manage-hybrid-exchange-recipients-with-management-tools
If you need further help, please feel free to reply this post directly so we will be notified to follow it up. Just checking in to see if above information was helpful. Please let us know if you would like further assistance.
Hi @Anonymous you can try the steps in https://learn.microsoft.com/en-us/exchange/troubleshoot/administration/changes-to-msexchangehiddenfromaddresslist-not-updated-against-recipient?source=recommendationsIf you don't see exchange attributes, you need to extend AD schema by installing exchange management tools and manage attributes with powershell. For further information, see https://learn.microsoft.com/en-us/exchange/manage-hybrid-exchange-recipients-with-management-tools