Yes, but please keep in mind the following:

• Make sure that your scheduled push interval is shorter than your cache expiration time. If cache expiration time is too high and your push scheduler doesn't refresh often enough, your users could be working with outdated information.
• Conversely, if cache expiration time is too low and you don't refresh often enough, your users will loose access to the contact lists on their device until the next scheduled or manual push.
• You should also consider that during an outage or emergency your systems may not be available to push a fresh contact list, therefore depriving your users of the information when they need it most.
• Lastly, more frequent pushes translate to additional workload for your servers, traffic in your network, and cellular data usage.

Keeping the above in mind, to change cache expiration time:

1. Go to the PINpoint Management Console.
2. Go to the Delivery tab.
3. Under the Channel tab go to Cache Control and change the value there.
4. Press 'Save'

Note: The time is specified in seconds. The default is 6,048,000 sec (= 10 weeks).