From the server cli where OnCommand is installed try starting with a... dfm host get -q
This will give you output similar to the following:
host=VMdatastore
hostPrimaryAddress=192.168.1.105
hostAdminPort=80
processHostIP=
hostClockSkewedThreshold=1 minute
hostClockNearlySkewedThreshold=30 seconds
The -q is important because it will return the values that need to be modified.
From there you can use the "dfm host set" command to set the appropriate values.
C:\>dfm host set help
NAME
set -- change settings (for example, hostFullName and hostPrimaryAddress) for a managed host.
SYNOPSIS
dfm host set <object> <option-name>=<option-value> ...
DESCRIPTION
Changes one or more options of a host.
All option names will be listed by executing
this command without any parameters.
Unfortunately the output above is from cDOT so I don't have an exact 7mode vfiler reference. So there may be slight nuances for 7mode that you will need to work through. Good luck!