Which column is mandatory in a CSV file used for bulk updating users?

The column that is mandatory in a CSV file used for bulk updating users is the APIUserName. This requirement stems from the need to accurately identify and update existing user accounts within the system. The APIUserName serves as a unique identifier for each user, ensuring that the correct records are targeted during the bulk update process. Without this information, the system would be unable to associate the updates with the appropriate user accounts, leading to errors or incomplete updates.

While other columns may provide essential information for the operation, such as UserEmail for contact details or UserRole to assign roles, they are not strictly mandatory for the update to proceed. The APIUserName is critical for the proper functioning of the bulk update process, highlighting its importance in maintaining accurate user data management within DocuSign.