How to display hostname of the media server instead of FQDN

Hi Experts,

I like to standardize all my 8 media servers to be display as hostname which i already register in the host file. From the NetBackup console only one of the media server display as FQDN.

Example:

ABC123

DEF456 - > display "def456.domain.my"

GHI789

How to change this media server name to display as hostname.

Note: I register both hostname and FQDN in hosts file entries.

Example:

10.10.0.1         ABC123          abc123.domain.my

10.10.0.2         DEF456          abc123.domain.my

10.10.0.3         GHI789           abc123.domain.my

I have tried to reinstall by modify and re-edit the hostname but unfortunately still same.