Single Item Recovery:versions

In Exchange 2013, after running Set-Mailbox Lousy -SingleItemRecoveryEnabled $true, I edit a message in OUTLOOK 2013. The versions subfolder under RecoveableItems folder is still empty. 

In Exchange 2010, after running Set-Mailbox Lousy -SingleItemRecoveryEnabled $true, I edit a message in OUTLOOK 2013. The versions subfolder under RecoveableItems folder will have one item.

In Exchange 2013, after placing a mailbox in-hold, I edit a message in OUTLOOK 2013. The DiscoveryHolds folder will have one more item but not versions subfolder.

Thanks,

Kaiming