Connecting to a PPM Server with an Invalid SSL Certificate
If the SSL certificate on the PPM Server is not valid, a warning message displays when you try to connect to the PPM Server. You can choose to Always Ignore (always ignore this warning message), Session Only (ignore the warning message for this Microsoft Project session only), or Cancel (do not connect to the PPM Server).
If you choose to always ignore the warning message, the message will always be ignored unless you change the connection to the PPM Server. If, after choosing to always ignore the warning message, you would like to display the warning message, change the PPM Server connection, save the changes, and then change the PPM Server connection back to the original connection.