We received notice that McKesson will have a communication outage on October 11, 2014. Here is what they have to say about it.
During our weekly scheduled maintenance window this weekend, there will be an interruption to our communications impacting AS2 and FTP (including SFTP). We anticipate the communications outage to take place between 9pm and 11pm Pacific Saturday, October 11. During the outage, we will be unable to send or receive data. Data outbound from McKesson will be held and sent after communications are restored. If you experience failures in delivering files to McKesson or retrieving files from McKesson’s servers during that period, please retry after the planned outage window (after 11pm Pacific Saturday, October 11).
Avoid trying to send orders/retrieve confirmations during that time frame.
If you have any trouble outside of that, feel free to contact our support team.