High Availability Error 35250 and “An error occurred while receiving data: '10054(An existing connection was forcibly closed by the remote host.)
After too many tries and reading lots of blogs about SQL Server error 35250, I can't solve this error.

Finally, I tried IP address in Endpoint URL and I successfully configured Always On availability group. Problem in FQDN name.

To use an IP address in Endpoint URL: First check below services are started. If not, then start on all replicas and DC:

1. DNS Client 
2. Function Discovery Resource Publication
3. SSDP Discover
4. UPnP Device Host


Above services help to discover all nodes in the network. Then check into network for your all node are shown over there. If not then follow these steps:
Go to Network and sharing center; click on change advanced sharing settings; and turn on network discovery.

TCP://10.10.10.530:5022