The DevicePasswordHistory element is an optional child element of type unsignedInt of the EASProvisionDoc element (section 2.2.2.27) that specifies the minimum number of previously used passwords stored to prevent reuse on the client 0 = Storage of previously used passwords is not required. >0 = The minimum number of previously used passwords to be stored.

public Nullable<uint> DevicePasswordHistory { get; set; }

public:
property Nullable<unsigned int> DevicePasswordHistory {
	Nullable<unsigned int> get ();
	void set (Nullable<unsigned int> value);
}