AD User Attributes

Checks that every enabled Active Directory user has a business phone (telephoneNumber).

telephoneNumber is the Telephone number field in Active Directory Users and Computers. It is shown in the address book and synced to Microsoft Entra ID as businessPhones. Many organisations leave it blank on purpose, so this test carries the tag Optional.

Remediation action

1. In Active Directory Users and Computers, open each user listed below and go to the General tab.
2. Fill in Telephone number and select OK.
3. For many users, use PowerShell with the ActiveDirectory module (RSAT): Set-ADUser -Identity <sAMAccountName> -OfficePhone '+14255550100'.
4. If the value comes from an HR system or a provisioning tool, fix it there, or the next import overwrites your change.
5. If an account legitimately has no value (a service or resource account), leave it out with ExcludedUsers, ExcludedGroups or the pack-wide CLT.ADUA.ExcludedOUs in maester-config.json rather than filling in a placeholder.

Related links

• Set-ADUser
• Telephone-Number attribute (Active Directory schema)
• Attributes synchronized to Microsoft Entra ID by Microsoft Entra Connect

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