Hi @Kuronuma
Thank you for reaching out to the community forum!
I understand that you would like to add additional fields in the template available there for bulk user import.
As per Microsoft documentation, it is not recommended to add additional columns to the template we don't recommend adding new columns to the template. Any additional columns you add are ignored and not processed.
Bulk create users in Microsoft Entra ID.
You can achieve this by using PowerShell to bulk create users and include the custom attribute "company name" in the CSV file.
Hope this helps. Do let us know if you any further queries.
Reference: https://learn.microsoft.com/en-us/answers/questions/1354866/how-to-add-company-name-for-a-bulk-of-user-in-azur
https://techcommunity.microsoft.com/t5/microsoft-entra/bulk-update-with-company-name-in-azure-ad/m-p/1561135
Thanks,
Akhilesh.
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.