MailEnable webmail is not accessible on a Plesk server: 401 – Unauthorized: Access is denied due to invalid credentials

Symptoms

MailEnable webmail is not accessible:

PLESK_INFO: 401 – Unauthorized: Access is denied due to invalid credentials.

Cause

Incorrect permissions for the MailEnable Webmail DocumentRoot folder.

Resolution

1. Connect to the Plesk server via RDP.

2. Start a command prompt and run the command below to launch MailEnable System Configuration Utility (The command depends on a Plesk version):

   C:> “C:Program Files (x86)Mail EnableBinmeinstaller.exe”

   OR

   C:> “%plesk_dir%Mail ServersMail EnableBinmeinstaller.exe”

3. Select the second option Web application reconfigure and click Execute. proceed with repair procedure:

   

4. Enter the password for the MailEnable Service Account and click OK.