Un-hide a user from address lists

Question

We have a user who is not showing up in any address lists.

We cannot change the Global Address list visibility from 365 admin center

Nore can we change it in the exchange online environment

After doing some googling I found that address list visability can be altered through the msExchHideFromAddressLists Attribute in the On Premises Active Directory.

When I found this attribute it was set to "TRUE", So I changed it to "FALSE" thinking this would resolve the issue.

It has not, and the user is still not visible in the global address list, both for users using the outlook app and for the admin account in Outlook Web App

Please could you advise what steps I should take to resolve this issue?

Answer 1

Hi @Sebastian Hurst-Palmer

Please try following the instructions from YukiSun-MSFT at https://learn.microsoft.com/en-us/answers/questions/435701/msexchhidefromaddresslists-has-been-set-to-true-af.html

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Answer 2

Hi. Thank you for your question and reaching out.

To make the recipient visible in address lists again, use the value $false for the HiddenFromAddressListsEnabled parameter.

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Answer 3

@Sebastian Hurst-Palmer

How this mailbox created on your organization? As DillonJS said, if this mailbox created on Exchange on-premises, you need to change this value from Exchange on-premises, the force AAD sync to sync this value to Exchange online.

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Answer 4

I found an additional attribute when looking in the metaverse for the user called msDS-cloudExtensionAttribute1 which had the value "HideFromGal"
I cleared this value and ran a ADSync, checked in 365 and the user is now visible in the GAL.

I searched the attribute name and value and came across this: https://jackstromberg.com/2018/08/how-to-hide-users-from-the-gal-in-office-365-synchronized-from-on-premises/

Thanks to all for assistance.