In this paper, different impacts of distributed energy resources (DERs) technologies on the flexible reliability (FR) and overall reliability (OR) have been investigated in hybrid AC-DC microgrid. A procedure for calculating the FR and OR is introduced. Then, a sensitivity analysis is carried out to reveal the impacts of each DER's capacity expansion on the OR and FR indices. It has been shown that some DERs may improve the OR indices, but impose some negative impacts on FR indices or vice versa. Indeed, OR and FR indices are highly dependent to the type and capacity of each DER technology and the topology of the microgrid. The results of this study show that different DER technologies have different impacts on OR and FR indices and increasing the capacity of each DER technology reveals a specific trend in changing the OR and FR indices.