Roaming between APs drops your wireless connection with 802.1X enabled

The following solution applies only to customers using a MS Server to manage their 802.1X authentication.
 

Symptom:  Roaming between AP's causes your wireless connection on an 802.1x-enabled SSID to disconnect, which may require a manual reconnect on the client machine.
 

Solution:  Select the "Enable Fast Reconnect" option under the PEAP settings for your wireless network policy.  

For more information, refer to the following Microsoft TechNet article: 

https://msdn.microsoft.com/en-us/library/cc754179(v=ws.11).aspx