Target
This article is intended for customers who are synchronizing users and passwords between their on-premises Active Directory (AD) and HENNGE Access Control, and wish to change the reference AD for the HENNGE Directory Sync Tool.
Purpose
This article describes the procedure for changing the reference AD for the HENNGE Directory Sync Tool.
Notes
1. This article is based on the product specifications as of September 2026 and may be subject to change without notice due to future updates.
Detailed Procedure / Description
1. Stop the HENNGE Directory Sync Tool
On the server where the HENNGE Directory Sync Tool is installed, go to [ Administrative Tools ] → [ Services ] and stop the [ HDE One Directory Sync ] and [ HDE Password Sync ] services.
* Depending on the version of the tool you are using, these may be displayed as [ HENNGE One Directory Sync ] and [ HENNGE Password Sync ].
* If you are not using password synchronization, stop only [ HDE One Directory Sync ] or [ HENNGE One Directory Sync ].
2. Change the Reference AD for the HENNGE Directory Sync Tool
Open the [ config.ini ] file located in [ C:\Program Files\HDE One Directory Sync ].
;; Domain information
server=In this section, enter the hostname or IP address of the new AD that the HENNGE Directory Sync Tool should reference, then save the file.
3. Clear Registry Values (Password Synchronization Only)
If you are synchronizing AD user passwords with HENNGE Access Control,
you will need to clear the registry values on the server where the HENNGE Directory Sync Tool is installed.
After clearing the registry values and restarting the HENNGE Directory Sync Tool,
the passwords of all users targeted for password synchronization will be synced to HENNGE Access Control.
After that, only the passwords of users who change their password will be synchronized to HENNGE Access Control.
3.1. Launch PowerShell on the server where the HENNGE Directory Sync Tool is installed and run the following command.
The current registry values referenced by the HENNGE Directory Sync Tool during password synchronization will be displayed.
* If multiple synchronization sources are specified in the [ src= ] section of the [ config.ini ] file, multiple registry values will be displayed.
function calcBin($val) { $ret = 0; for ($num = 0; $num -lt $val.length; $num++) { $ret += $val[$num] * [math]::Pow(256, $num) }; return $ret }; $base = "registry::HKEY_LOCAL_MACHINE\SOFTWARE\HDE One Directory Sync"; $sources = Get-ChildItem -Path $base | ForEach-Object { $val = (Get-ItemProperty -Path $_.PSPath).highestCommittedUSN; if ($val) { "{0} : {1}" -f $_.PSChildName, (calcBin($val)) } }; if ($sources) { $sources } else { $baseVal = (Get-ItemProperty -Path $base).highestCommittedUSN; if ($baseVal) { calcBin($baseVal) } }3.2. Run the following command in PowerShell to clear the registry values.
function calcNum2Bin($val){ $ret = New-Object byte[] 8; $mod_ori = $val; $keta = 0; while ($mod_ori -ne 0) { $mod_amari = $mod_ori % 256; $ret[$keta] = $mod_amari; $keta++; $mod_ori = ($mod_ori - $mod_amari) / 256 }; return $ret }; $base = "registry::HKEY_LOCAL_MACHINE\SOFTWARE\HDE One Directory Sync"; Get-ChildItem -Path $base | ForEach-Object { New-ItemProperty -Path $_.PSPath -Name highestCommittedUSN -Value (calcNum2Bin(1)) -PropertyType Binary -Force | Out-Null; "Reset: $($_.PSChildName)" }3.3. Run the command from step 3.1 again in PowerShell and confirm that the registry value is set to 1.
4. Restart the HENNGE Directory Sync Tool
On the server where the HENNGE Directory Sync Tool is installed, go to [ Administrative Tools ] → [ Services ] and start the [ HDE One Directory Sync ] and [ HDE Password Sync ] services.
* Depending on the version of the tool you are using, these may be displayed as [ HENNGE One Directory Sync ] and [ HENNGE Password Sync ].
* If you are not using password synchronization, start only [ HDE One Directory Sync ] or [ HENNGE One Directory Sync ].
5. Check Sync Logs
Log in to the HENNGE One Access Control Administration according to the following Help Center article. Once the Administration is displayed, select Sync Logs.
How to Access the HENNGE One Access Control Administration (Modern View)
For more information about Sync Logs, please refer to the following Help Center article.