[1] Otto Didrik Schack was born on 21 September 1652 in Kiel in the Duchy of Holstein.
From 1670 to 1671 he was educated at the knight academy in Saumur that prepared aristocratic youth for state and military service, and in 1671, he was made a kammerjunker at the Danish court.
In 1674 he was appointed amtmann of the Amt of Riberhus, and on 14 June the same year he was awarded the Order of the Dannebrog.
[2] At the death of his father in 1676, he inherited the large manors of Schackenborg and Gram in Southern Jutland, and Gisselfeld in Zealand.
[1] Count Schack died already on 1 July 1683, aged only 30, in Itzehoe in the Duchy of Holstein.