Invalid Custodian:
Figure 1. Screen shot of a sample search criteria with the error displayed.
This error occurs when a search creator / reviewer tries to select a Custodian or target that already has been populated in the To or From field(s) while the option "Use Historical Information for Custodians and Custodian Groups" is selected. The custodian noted in the error is either not a historical custodian or does not fit the date range specified.
The "Use Historical Information for Custodians and Custodian Groups" option allows the use of both active and deactivated Custodians or Custodian Groups in the search criteria. If this option is unchecked, Discovery Accelerator uses only the currently active set of custodians, and groups. Any deactivated users and groups are excluded from the search.
With the option selected, any deactivated Custodian or Custodian Group that was active during the date span of the search will be available for selection into the search criteria. When a search is configured to select Custodians or Custodian Groups prior to specifying a date span for the search, the specification of the date span can cause deactivated Custodians to not be valid for that date span, which can also cause the error to be displayed.
Follow the steps below to ensure only valid Custodians or Custodian Groups are selected based on the search date span: