The APNs certificate implemented in IBM Notes Traveler 9.0.1.21,will expire on 30th March and therefore the Push Notifications for Apple iOS devices will not be possible with the “default” certificate.
The easiest way to make sure that the Push Notifications functions properly is to update your Traveler Server to 10.0.0.0 or newer release. Index of all IBM Notes Traveler Releases:
http://www-01.ibm.com/support/docview.wss?uid=swg21700212#10011
In order to upgrade Traveler, there is no need to update Domino to the Version 10, although I would strongly recommend it. Traveler 10.0.X System Requirements:
Thoughts about HCL Connections, Domino and Sametime 
Hi Milan, Do you know if the IBM Traveler 9.0.x APN certificates will definitely expire on a specific date or will they be functional until an indefinite date?
I have an IBM Traveler 9.0.1.21 server, which “in theory” should have already expired the APN certificate, however I still see connections of Apple phones with iOS (without any problem).
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Hello Eric,
they will definitely expire. The iOS devices will function afterwards but you will have some limitations, take a look at the following:
https://mediacenter.ibm.com/media/How+IBM+Traveler+Uses+Apple+Push+Notification+Service+(APNS)/1_ru4zbvl6
Regarding the update, the newest Traveler Version works with Domino 9.0.1, take a look at the System Requirements:
https://support.hcltechsw.com/csm?id=kb_article&sysparm_article=KB0036337
The Traveler 11 brings many BugFixes and very important improvements regarding iOS devices. So I can only recommend you to update to the latest version.
Best regards,
Milan
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