There are no VITK cmdlets nor any SDK methods that will allow you to do the same thing as the esxcfg-auth command does.
The only solution, afaik, is run the esxcfg-auth command from within a PS script.
To be able to do that there are some prerequisites:
1) you need to install putty on the machine from which you want to run the PS script.
The script use the plink.exe program.
2) you need to configure an account, with the required privileges, in the COS of the ESX server
2a) since we don't allow SSH with the root account we use a dedicated account for this
2b) add this account to the required groups in the COS (we use the same groups that the root account has)
2c) add an entry in the /etc/sudoers file to avoid password prompts for this account
...
<accountname> ALL=(ALL) NOPASSWD: ALL
...
If all the prerequisites are met you can use a script like this to execute the esxcfg-auth command.
$User = <accountname>
$Pswd = <password>
$ESX = <ESX-server>
$plink = <path-to>\plink.exe"
$plinkoptions = " -v -batch -pw $Pswd"
$cmd = 'sudo -u root /usr/sbin/esxcfg-auth --enablead --addomain=my.company.com --addc=mydc.company.com'
$remoteCommand = '"' + $cmd + '"'
$command = $plink + " " + $plinkoptions + " " + $User + "@" + $ESX + " " + $remoteCommand
Invoke-Expression -command $command
Note that this way of working is not very secure.
You do have a clear-text password in the script !
