Horde webmail is not available with Error 503 or 403.14 Forbidden

Created:

2016-11-16 13:10:55 UTC

Modified:

2017-08-16 16:26:44 UTC

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Horde webmail is not available with Error 503 or 403.14 Forbidden

Applicable to:

  • Plesk for Windows
  • Plesk 11.x for Windows

Symptoms

An attempt to open Horde webmail fails with the following errors:

HTTP Error 503 - Service Unavailable

OR

HTTP Error 403.14 - Forbidden

The webmail(horde) application pool identity is set to build-in account 'Network Services' .

Cause

There are several possible causes:

  1. Webmail(horde) application pool is stopped

  2. Webmail(horde) application pool identity is set incorrectly

  3. IIS IUSRPLESK_horde password is not synced with system

Resolution

  1. Make sure that IIS Manager > Application pools > webmail(horde) is running

  2. Make sure that IIS Manager > Application pools > webmail(horde) > Advanced Settings > Process Model > Identity is set to Custom account > IUSRPLESK_horde

  3. Reset the password for pool user IUSRPLESK_horde at Computer Management > Local Users & Groups

    Then set the same password at:

    IIS Manager > Application pools > webmail(horde) > Advanced Settings > Process Model > Identity > Custom account > Set > IUSRPLESK_horde

    Identity

    If the issue persists generates new passwords for the built-in IIS users by running the following command:

    "%plesk_cli%\\repair.exe" --regenerate-web-server-users-password
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