TLS 1.0 was disabled on May 30th.
Merchants that have not upgraded by this date will experience service outages and will not be able to connect.
The Payment Card Industry Security Standards Council (PCI SSC) announced a mandate for transitioning from all versions of SSL and TLS 1.0 communication protocols to a more secure version of TLS (currently TLS v1.1 or higher)
Their compliance deadline for all transaction traffic to update to TLS 1.1+ is June 1st.
Please click on the above link on this page titled "Click Here For Complete Details & Test Instructions" for upgrade information.