Konica Minolta bizhub C451 - Manual (Page 317)

Specifying Utility mode parameters 7
C451 7-25
ID & Print Delete Time
Specify the length of time until documents are deleted from the ID & Print
User Box after they are saved.
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Detail
[ID & Print Delete Time] appears if user authentication settings have been
specified.
1
Touch [5 ID & Print Delete Time] in the User Box Settings screen.
2
To automatically delete the documents, touch [Yes], and then select
the time period.
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Detail
The time until documents are deleted can be set to 12 hours, 1 day, 2
days, 3 days, 7 days or 30 days.