Phase Toolkit Send Application Send Description list of usernames _EOD_ ACK A filter list of user names is sent. START DISCOVER Tells the custom application to begin sending records from the discover task. ACK RECORD The custom application sends this command when it has discovered a record to send to the toolkit endpoint. ACK record data The record data is sent in the same format as it was passed previously. ACK END_ DISCOVER   Indicates that there are no more records to discover. ACK DATA_ERR A data error is sent if, for example, an attempt to delete a suer record fails because that user does not exist. ACK error message The message passed to the toolkit should be informative. ACK IO_ERR An IO error could be anything related to the application not understanding the record data passed. The Protocol 86 User Administration Version 3.8