Dhoni will be staying with his 106 TA Battalion (Para) till August 15 and undertake duties with the troops, Army officials said.
The Territorial Army is a reservist force that draws on civilians who can do short stints to assist the military. Dhoni will be doing a 15-day stint with the Rashtriya Rifles' Victor Force engaged in counter-insurgency operations.
He will be taking on the duties of patrolling, guard and post duty and would be staying with the troops, the army had said in a statement.
Dhoni was not included in India's ongoing T20I series against the West Indies or the ODI series in the Carribean that follows.