503 Service unvailable - Failed to decrypt attribute 'password'

Created:

2016-11-16 13:00:31 UTC

Modified:

2017-04-25 09:58:31 UTC

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503 Service unvailable - Failed to decrypt attribute 'password'

Applicable to:

  • Plesk 12.0 for Windows

Symptoms

I have restore backup from Plesk on this server. On of websites showing 'Error 503'.In the Windows Application Log I see the error message:

Log Name:      Application
Source: Microsoft-Windows-IIS-W3SVC-WP
Date: 2/5/2015 12:43:04 AM
Event ID: 2307
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: ThisPC
Description:
The worker process for application pool 'domain.tld(domain)(4.0)(pool)' encountered an error 'Failed to decrypt attribute 'password'
' trying to read configuration data from file '\\\\?\\C:\\inetpub\ emp\\apppools\\domain.tld(domain)(4.0)(pool)\\domain.tld(domain)(4.0)(pool).config', line number '155'. The data field contains the error code.

Cause

Corrupted config file.

Resolution

  1. Create a backup of IIS configuration:

    %Winddir%\\System32\\inetsrv\\appcmd.exe add backup IIS-BACKUP
  2. Stop IIS

  3. Edit %Winddir%\\System32\\inetsrv\\config\\applicationHost.config remove user and password attributes from a virtual folder definition at line from an error message.

  4. Start IIS

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