Which action should an administrator take to remove a member's access to an ArcGIS Online organization while retaining their training history?

To remove a member's access to an ArcGIS Online organization while retaining their training history, the correct action is to keep Esri access enabled on the member's account. By maintaining Esri access, the member's account remains linked to the organization, which allows their training history to be preserved within the system. This is crucial because disabling or converting the account could result in the loss of access to this important information.

When an account is turned into a public account, or when the account is disabled, the association with the organization's training history can be severed, which is not desirable for retaining valuable training accomplishments. Additionally, requesting a transfer of training history is not necessary or practical, as retaining access while disabling certain permissions achieves the desired outcome.

Therefore, keeping Esri access enabled ensures that the member’s training history is maintained, allowing potential future use of this information without compromising the current access control settings for the organization.