Sync status will be blank when nothing to sync.
HI there ... does anybody know why replication status section done empty ?  10:   ID                           = 171798692301_APM00163433116_0000_171798692031_xxx_0000      Name                         = rep_sess_res_75_res_60_APM00163433116_xxx      Session type                 = file      Synchronization type         = auto      RPO                          = 10m      Resource type                = File System      Sync State                   = idle      Health state                 = OK (5)      Health details               = "This replication session is operating normally. No action is required."      Operational status           = Auto Sync Configured (0x8405)      Source status                = OK      Destination status           = OK      Network status               = OK      Destination type             = remote      Destination system           = RS_3      Local role                   = Source      Source resource              = res_75      Source SP-A interface        = 10.241.xxx.28      Source SP-B interface        = 10.241.xxx.29      Destination resource         = res_60      Destination SP-A interface   = 10.241.xxx.30      Destination SP-B interface   = 10.241.xxx.22      Time of last sync            = 2017-05-18 05:19:05      Sync status                  = <<<<       Sync transfer rate           = N/A      Sync transfer size remaining = 0      Previous transfer rate       = 110 MB/s      Average transfer rate        = 110 MB/s      Element pairs                = N/A
UMCLI show -detail or show ( replication check cmd )