Step 1In a small saucepan, bring 3 cups of water to a boil, add the tea bags and remove from the heat. Steep 5 minutes. Place the prunes in a medium heat-proof bowl and cover with the tea. Soak overnight at room temperature.
Step 2The next day, drain the prunes, discarding the tea. Roll the prunes in paper towels to dry well and place them in a sterilized 1 1/2 -quart, wide-mouth glass canning jar.
Step 3In a small saucepan, combine the sugar with one-half cup water. Bring to a boil over high heat and boil for 2 minutes. Remove from the heat and cool completely.
Step 4Pour the cooled syrup over the prunes. Completely cover the prunes with the Armagnac, then stir the mixture. If the prunes rise above the line of the liquid, add more Armagnac.
Step 5Let the prunes in Armagnac soak a minimum of 2 weeks in a cool, dark place or in the refrigerator. The soaked prunes will keep for up to one year.