What is a disconnector?

A staging object that is not linked to a metaverse object is called a disjoined object (or disconnector object). In other words, some attributes from your on-premises Active Directory are not correctly synchronized with Azure Active Directory.

Options to check\view disconnectors?

With Azure AD connect there are no options to view these disconnectors. The feature was present with DirSync but now is decommissioned in Azure AD Connect. The main reason is that these disconnectors are not affecting your synchronization process.

Options to fix disconnectors issues?

These disconnectors issues are coming only from your on-premises AD and then populated to Azure AD. The starting point is to verify and cleanup your on-premises AD before having your first synchronisation with Azure AD. You can use IdFix tool, additional information in the following article: https://support.office.com/en-us/article/Install-and-run-the-Office-365-IdFix-tool-f4bd2439-3e41-4169-99f6-3fabdfa326ac

If you have already synchronized your AD with Azure AD (before cleaning it up) the only way to fix these disconnectors is:

  1. Verify and clean up your on-premises AD using IdFix tool
  2. Perform a clean Azure Active Directory  installation (re-create the mysql metaverse database) using the following steps:

a. Uninstalling products

The menu of Programs and Features, uninstall all of the following products:

With Azure Active Directory Connect

  • Microsoft Azure Active Directory Connect Tool
  • Microsoft Azure AD Sync
  • Forefront Identity Manager Windows Azure Active Directory Connector
  • Microsoft SQL Server 2012 Express LocalDB
  • Microsoft SQL Server 2012 Native Client
  • Microsoft SQL Server 2012 Command Line Utilities
  • Microsoft Online Services Sign-in Assistant (restart required)
  • Windows Azure Active Directory Module for Windows Powershell

With Azure Active Directory Sync (standalone)

  • Microsoft Azure AD Connection Tool
  • Microsoft Azure AD Sync
  • Forefront Identity Manager Windows Azure Active Directory Connector
  • Microsoft SQL Server 2012 Express LocalDB
  • Microsoft SQL Server 2012 Native Client
  • Microsoft SQL Server 2012 Command Line Utilities
  • Microsoft Online Services Sign-in Assistant (restart required)
  • Windows Azure Active Directory Module for Windows Powershell

b.  Deleting files

The uninstall wizard does not remove certain files , which can cause problems when reinstalling. You must delete the following folders:

 With Azure Active Directory Connect

  • C:\Program Files\Microsoft Azure Active Directory Connect
  • C:\Program Files\Microsoft Azure AD Sync

With Azure Active Directory Sync (standalone)

  • C:\Program Files\Microsoft Azure AD Connection Tool
  • C:\Program Files\Microsoft Azure AD Sync

c. Remove the scheduled tasks

You should also remove the scheduled task starting the synchronization objects in the cloud

Open the Task Scheduler

In the container Task Scheduler Library, Right-click Azure AD Sync Scheduler click-on delete

d. Registry Clearing

Open the registry as an administrator and delete the following keys if they exist or run following lines in cmd prompt.

With Azure Active Directory Connect

REG DELETE “HKLM\SOFTWARE\Microsoft\AD Sync” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Azure AD Connect” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Microsoft SQL Server Local DB” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\MSOLCoExistence” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MicrosoftAzureADConnectionTool” /f
REG DELETE “HKLM\SYSTEM\CurrentControlSet\Services\ADSync” /f
REG DELETE “HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application\AzureActiveDirectoryDirectorySyncTool” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Tracing\AzureADConnect_RASAPI32” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Tracing\AzureADConnect_RASMANCS” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Tracing\DirectorySyncTool_RASAPI32” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Tracing\DirectorySyncTool_RASMANCS” /f

With Azure Active Directory Sync (standalone)

REG DELETE “HKLM\SOFTWARE\Microsoft\AD Sync” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Microsoft SQL Server Local DB” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\MSOLCoExistence” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MicrosoftAzureADConnectionTool” /f
REG DELETE “HKLM\SYSTEM\CurrentControlSet\Services\ADSync” /f
REG DELETE “HKLM\SYSTEM\CurrentControlSet\Services\EventLog\Application\AzureActiveDirectoryDirectorySyncTool” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Tracing\DirectorySyncTool_RASAPI32” /f
REG DELETE “HKLM\SOFTWARE\Microsoft\Tracing\DirectorySyncTool_RASMANCS” /f

e. You can now restart the installation of Active Directory Azure Connect.

Additional information in the following articles:

https://docs.microsoft.com/en-us/azure/active-directory/active-directory-aadconnectsync-understanding-architecture Azure AD Connect sync: Understanding the architecture