For testing the Autodesk license connection, it is easier to use kick:

Windows:

set ADSKFLEX_LICENSE_FILE=@server

set FLEXLM_BATCH=1
set FLEXLM_DIAGNOSTICS=3
set ADCLMHUB_LOG_LEVEL=T

cd C:\solidangle\mtoadeploy\2018
bin\kick -v 4 -nostdin -i NUL 

MacOS, Linux:

export ADSKFLEX_LICENSE_FILE=@server

export FLEXLM_BATCH=1
export FLEXLM_DIAGNOSTICS=3
export ADCLMHUB_LOG_LEVEL=T


bin/kick -v 4 -nostdin -i /dev/null 

For ADSKFLEX_LICENSE_FILE, just replace "server" with the actual name, or IP address, of the license server.

You may need to add the port number (for example, 27000@server or, in rare cases, 2080@server).

In the Arnold log, look for the clm messages (you can ignore the rlm messages). You'll see something like for a successful license check out:

00:00:00 41MB | authorizing ...
Checkout succeeded: 86985ARNOL_2018_0F/0E58 8008 A9A7 6F03
        License file: @localhost
        License Server: @localhost
00:00:00 50MB | [clm] authorized for "86985ARNOL_2018_0F" in 0:00.35
00:00:00 50MB | [clm] expiration date: permanent, in use: 1/5 

If the license check out fails, then you'll see something like this:

 00:00:00    562MB         | authorizing ...
FlexNet Licensing checkout error: License server machine is down or not responding.
 See the system administrator about starting the license server system, or
 make sure you're referring to the right host (see LM_LICENSE_FILE).
Feature:       86985ARNOL_2018_0F
Hostname:      127.0.0.1
License path:  @localhost;
FlexNet Licensing error:-96,491
For further information, refer to the FlexNet Licensing documentation,
available at "www.flexerasoftware.com".00:00:05   562MB         |  [rlm] error initializing license system:
00:00:05   562MB         |  [rlm]  * Can't read license data (-102)
00:00:05   562MB         |  [clm] generic license checkout error (22)
00:00:05   562MB         |  environment variables:
00:00:05   562MB         |  [rlm]  solidangle_LICENSE    = (not set)
00:00:05   562MB         |  [rlm]  RLM_LICENSE           = (not set)
00:00:05   562MB         |  [clm]  ADSKFLEX_LICENSE_FILE = @pinkman
00:00:05   562MB         |  [clm]  LM_LICENSE_FILE       = (not set) 

When a license check out fails, you should also check the Adlm logs.

Where is kick? It depends on your software and OS:

C4DtoA

Windows: C:\Program Files\MAXON\Cinema 4D R19\plugins\C4DtoA\arnold\bin

OSX: /Applications/MAXON/CINEMA 4D R18/arnold/plugins

MtoA

Windows: C:\solidangle\mtoadeploy\2017\bin

OSX: /Applications/solidangle/mtoa/2018/bin