Renewing Apple Tokens in Intune

This certificate expires ever 365 days and must be renewed prior, otherwise all iOS devices will need to be reenrolled. 

there's lots of documentation out there about how to do this, such as the below, the main things to remember is to log into Apple Push Certificates Portal with apple@pbr.org.au and to renew the existing certificate, rather than creating a new one

There is a recurring ticket in helpdesk for this to be done