This idea has been merged into another idea. To comment or vote on this idea, please visit IMSMO-I-4 Make the default IMSMO server side sync window to be unlimited or at least 365 days.
Currently, the default days to sync on IMSMO Cloud Mails is only 30 days and it is not configurable unlike the on-premise IMSMO.
Many customers are requesting for this feature because users are forced to archive and use 2 mail files. Also, when a user will be reconfigured on a different machine, he will not be able to see his old mails as well. Only mails within the 30-day period.