Why is it important for administrators to delete unused or obsolete accounts?

The importance of deleting unused or obsolete accounts primarily revolves around security and access control. When accounts are left inactive, they can pose a significant risk as they may be exploited by unauthorized individuals if they happen to gain access to those accounts. By maintaining a clean and updated list of active accounts, administrators significantly reduce potential vulnerabilities within the system.

In addition, removing unused accounts helps to secure sensitive data and resources that those accounts may still have permission to access, ensuring that only authorized users can interact with the organization's ArcGIS Online environment. This practice not only enhances security but also reinforces the overall integrity of the data management system.

Other reasons related to optimizing credit usage, member fairness, and onboarding speeds are valid considerations for account management but are secondary to the critical necessity of protecting against unauthorized access.