The Sametime Proxy server ships with an SSL certificate to allow for push notifications to occur securely for the Sametime Mobile Chat client for Apple iOS via the Apple Push Notification Service (APNS). The current certificate expires 9 June 2015.
Before that date, Sametime administrators should download and apply an updated certificate to continue expected functionality for users.
If the certificate in use by the Sametime Proxy server has expired, users of the native iOS chat client will no longer receive push notifications. Users might describe the symptom as receiving messages only when the application is in the foreground or that notifications are not sent to the device when the Sametime client application is in the background.
The issue can be identified in the server logs by the following error.
“APNSService W com.ibm.collaboration.realtime.stproxy.services.APNS.APNSService startAPNS CLFRX0079W: Unable to establish an SSL connection to the APNS service Connection refused: connect”