Summary: Use the Set-ADUser cmdet to modify custom attributes.
How can I use Windows PowerShell to modify a custom attribute in Active Directory?
Use the Set-ADUser cmdlet and it’s –add, -replace, and –remove parameters to adjust custom attributes.
For example, to update the Info attribute in Active Directory and replace it with a new value:
SET-ADUSER john.smith –replace @{info=”John Smith is a Temporary Contractor”}