Forum Moderators: buckworks
The upgrade is scheduled to begin at 9 PM PDT and last for approximately two hours. During this time, there will be a PayPal system-wide service interruption. The PayPal site will be unavailable and the majority of PayPal features will not be functioning. You will not be able to process payments during this time.
And...
If you have hard-coded PayPal’s IP addresses into your API calls and/or firewall settings, you may need to reconfigure these settings after the upgrade. Here is the new IP address you will need to upgrade to: [ppmts.custhelp.com...]