Unhide user's mailbox in Exchange Admin Center

Dan Smart 25 Reputation points

We have a user that has Hide from Global Address List (GAL) set to 'yes' in Exchange Admin Center.

When I set to 'NO' and save I get "Operation Failed"

I checked the "msExchHideFromAddressLists" attribute on our on premises AD and that attribute isn't even listed.

We don't have an on premises Exchange Server

I'm stumped any help is appreciated.

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2 answers

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  1. Andy David - MVP 145.1K Reputation points MVP

    Ok, are you using AADConnect to sync from on-prem to Azure? If so, then the only way to make that work is add the Exchange schema by this method ( and then refresh the AADconnect schema in the AADConnect Wizard)


    or not sync from on-prem.

    1 person found this answer helpful.

  2. Andy David - MVP 145.1K Reputation points MVP

    Was Exchange ever installed? Its not supported to remove it from -prem unless you meet certain requirements if you are syncing with AAdConnect.

    If Exchange was previously installed, then that attribute should be available. If are not seeing it on-prem, it could be just your filter view of that account. Make sure the view is set to show all values - even ones that are blank.