802.11r is also not available while using NAT mode or Layer 3 roaming.

15 meters is pretty close to the edge of a typical cell edge in an office environment where MR33 would propagate it signal in a donut shape. That may be your issue, particularly for VoIP. One possible issues you can address:- APs at the ceiling lev...

I believe this link will helphttps://documentation.meraki.com/MR/Other_Topics/Cisco_Meraki_and_Umbrella_Integration_-_MR_Advanced%2F%2FUpgrade_License

Short answer is yes. MA-ANT-21 is for 5GHz bandMA-ANT-24 is for 2.4GHz band2x N-Type antenna ports are located at the top of the MR72 and 2x are located at the bottom of the MR72. The pairs of antenna ports each correspond to the 2 client serving rad...