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Cannot hide user from GAL

Tyler Potenberg 0 Reputation points
2025-11-26T18:12:51.0266667+00:00

No on-prem Exchange. Exchange Management tools were installed to expand the AD schema to include msExchHideFromUserList. msExchHideFromUserList set to TRUE in on prem AD. Does not sync to AzureAD Connect after running Start-ADSyncSyncCycle -PolicyType Delta on our Azure Sync Server.

Someone suggested that I need a sync rule set to make it work. Checked sync rules. msExchHideFromUserList is not an option for syncing rules. Not sure what I missed.

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Exchange Online

A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.

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  1. Vasil Michev 127K Reputation points MVP Volunteer Moderator
    2025-11-26T19:09:27.4666667+00:00

    After you extend the schema, you need to reconfigure the sync tool. There's an option specifically for this scenario, as detailed for example here: https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/how-to-connect-installation-wizard#refresh-directory-schema

    Doing so will ensure that the relevant rules are provisioned. One other thing to keep in mind is that the object itself must fall within the scope of the corresponding rule, which basically translates to having a non-null value for the alias/mailnickname attribute.

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