Can't find msexchHideFromAddressLists Attribute

 Issue:

Can't find msexchHideFromAddressLists Attribute in ADSI edit or in AD users and computers to change it for the users.

Cause:

In the environment there is only Exchange online, no exchange on Prem and there never was, so the MSexch attributes are not there.

Resolution:

We downloaded the Exchange server prerequisites on another domain joined server as in here:
Exchange Server prerequisites, Exchange 2019 system requirements, Exchange 2019 requirements | Microsoft Learn
Downloaded Exchange server ISO from here:
Exchange Server build numbers and release dates | Microsoft Learn

Mount the ISO and then we run the command:
<Virtual DVD drive letter>:\Setup.exe /IAcceptExchangeServerLicenseTerms_DiagnosticDataON /PrepareSchema

and the Attribute appeared.


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