DirSync – Unable to establish a connection to the authentication service. Contact Technical Support.

Symptom: You receive the following errors when running the Windows Azure Active Directory Sync tool Configuration Wizard or the Microsoft Online Services Directory Synchronization Configuration Wizard.

Synchronization Service Manager shows stopped-server-down status.
stopped-server-down Synchronization Service Manager

You receive the following events inside of event viewer:

Log Name: Application
Source: Directory Synchronization
Date: %Date%
Event ID: 0
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: %ComputerName%
Description:
Unable to establish a connection to the authentication service. Contact Technical Support. GetAuthState() failed with -2147186688 state. HResult:0. Contact Technical Support. (0x80048862)
Log Name: Application
Source: Directory Synchronization
Date: %Date%
Event ID: 102
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: %ComputerName%
Description:
Unable to establish a connection to the authentication service. Contact Technical Support.

Log Name: Application
Source: FIMSynchronizationService
Date: %Date%
Event ID: 6803
Task Category: Management Agent Run Profile
Level: Error
Keywords: Classic
User: N/A
Computer: %ComputerName%
Description:
The management agent “TargetWebService” failed on run profile “Delta Confirming Import” because the server encountered errors.

The Windows Azure Active Directory Sync tool Configuration Wizard presents you the following error message:
Unable to establish a connection to the authentication service. Contact Technical Support.
Unable to establish a connection to the authentication service. Contact Technical Support

Solution: This turns out to be an issue with the provided credentials entered in the Windows Azure Active Directory Credentials step.  Please make sure you verify the following.

  1. Do not use a federated Global Administrator service account.  Federated service accounts are not allowed to be used with the synchronization tool.  You should have a non-federated Global Administrator account with an @mydomain.onmicrosoft.com UPN.
  2. Ensure your Office 365 Global Administrator service account’s password has not expired.

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