I'm having this problem at Service Center, after the login when using Microsoft Login Connector.
[1] The underlying connection was closed: An unexpected error occurred on a send.
[2] Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
[3] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
What can be the reason for this error?