My application sends notification the .p12 certificate expiring soon so do we need to send the application again to Apple store ?
If not then we just create wlapp file with new .p12 certificate and deploy on our Mobilefirst server or we need to do more configuration ?
Please advice ?
No.
You could replace the certificate in the project and re-build it so an updated .wlapp file is created, and then deploy this .wlapp file to the MobileFirst Server.
Alternatively, instead of rebuilding the application, you call also call a server endpoint to update only the certificate. See here: http://www.ibm.com/support/knowledgecenter/SSHS8R_7.1.0/com.ibm.worklight.apiref.doc/apiref/r_restapi_apns_credentials_put.html