Note for configuring SNMP when using it with VDOM enabled.
By default the management VDOM is root, you can confirm the management VDOM using:
config global
show full system global | grep management-vdom
****step *****
FGT1KDTB19800467 # config global
FGT1KDTB19800467 (global) # config system global
FGT1KDTB19800467 (global) # set management-vdom OOB-MGMT
*** confirm ****
FGT1KDTB19800467 (global) # show full system global | grep vdom
set management-vdom “OOB-MGMT”
set vdom-admin enable
set long-vdom-name disable