Per the below thread Google has recently opened the ability to synchronize the snoozing of Calendar items but eM Client doesn’t yet support it. If this was added then you could snooze a Calendar item from eM Client and then that item on your smartphone would then also be snoozed for the same length. Right now I have to either snooze both or dismiss one of them but it would be preferable if they were synced. Please vote for this idea.