Changing FCT services port to TCP/8888 is not possible

[AtiT]

Hello,

How can I find which process uses the port TCP/8888 on FortiManager or where it is set in the configuration?

I want to set the FortiClient service port to 8888 but I receive the following error:

fmg62 # config fmupdate fct-services

(fct-services)# get status : enable port : 80

(fct-services)# set port 8888

(fct-services)# end [style="background-color: #ffff00;"]New FCP Service port has already been used.[/style] [style="background-color: #ffff00;"]object set operator error, -651, roll back the setting[/style] [style="background-color: #ffff00;"]Command fail. Return code -651[/style]

fmg62 #

FortiManger-VM version 6.2.1.

The document on https://docs.fortinet.com/document/fortimanager/6.2.0/ports-and-protocols/189421/incoming-ports does not list the port TCP/8888.