What is Windows Error 8556 (ERROR_DS_UNICODEPWD_NOT_IN_QUOTES)?

Error 8556 (ERROR_DS_UNICODEPWD_NOT_IN_QUOTES) is a Windows Active Directory error that occurs when the unicodepwd attribute value must be enclosed in double quotes.. This guide provides step-by-step solutions to resolve this issue.

What causes Error 8556?

Computer lost domain trust. Time sync beyond Kerberos limit. DNS preventing DC discovery. Account locked or disabled

How do I fix Error 8556 (ERROR_DS_UNICODEPWD_NOT_IN_QUOTES)?

Rejoin the Domain: Open System Properties → Change → set to Workgroup → OK → Restart. Then change back to Domain → enter domain name → OK → Restart. This re-establishes the trust relationship

Fix ERROR_DS_UNICODEPWD_NOT_IN_QUOTES — Windows Error Code 8556

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⚡ Quick Fix

Rejoin the Domain: Open System Properties → Change → set to Workgroup → OK → Restart

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📑 Table of Contents

What is Error 8556? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 8556?

Windows System Error Code 8556, known as ERROR_DS_UNICODEPWD_NOT_IN_QUOTES, is a Active Directory error that occurs during Active Directory and directory services. The error indicates that: The unicodePwd attribute value must be enclosed in double quotes. When this error is encountered, the Windows operating system was unable to complete the requested operation within the directory services subsystem. The error code 8556 is returned by the GetLastError() function and provides developers with a specific identifier to diagnose the root cause of the failure. The symbolic name ERROR_DS_UNICODEPWD_NOT_IN_QUOTES maps directly to this numeric code and is commonly referenced in Microsoft documentation, developer forums, and system logs. Understanding this error and its context within Active Directory and directory services is essential for effective troubleshooting.

⚠️ Common Causes

Computer lost domain trust
Time sync beyond Kerberos limit
DNS preventing DC discovery
Account locked or disabled

✅ Step-by-Step Solutions

1 Rejoin the Domain

Open System Properties → Change → set to Workgroup → OK → Restart
Then change back to Domain → enter domain name → OK → Restart
This re-establishes the trust relationship

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💻 Diagnostic Command

Run this PowerShell command to find related events in your system log:

Get-EventLog -LogName System -Newest 20 | Where-Object {$_.Message -like "*8556*" -or $_.Message -like "*ERROR_DS_UNICODEPWD_NOT_IN_QUOTES*"} | Format-List

💡 Open PowerShell as Administrator, paste the command above, and press Enter.

🛡️ Prevention Tips

Ensure reliable NTP sources
Monitor DC health with dcdiag
Use redundant DNS servers

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Last updated: 2026-03-13

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Based on Official Microsoft Documentation

Solutions Tested on Windows 10 & 11

Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-13.