401 - Unauthorized: Access is denied due to invalid credentials


When navigating to the web mail or web admin client the following error is presented in the browser:

401 - Unauthorized: Access is denied due to invalid credentials.
You do not have permission to view this directory or page using the credentials that you supplied.


This could be caused either by a password mismatch between the IME_USER service account password and the password that is set for IME_USER account under the MailEnable WebMail website, or it could be the IME_USER account being locked out.


  • Check that the IME_USER Windows account is not locked out. If it is locked out, review your account lockout policy to prevent this Windows account from being locked.
  • Navigate within the MailEnable installation folder to: Mail Enable\BIN.
  • Locate the "meinstaller.exe" file and right click and select "Run as Administrator", if available.
  • In the "MailEnable System Configuration Utility" options window click on option 2: "Web application reconfigure (File Perms, User Rights, COM+, IIS Proxy User, etc.) and then click the "Execute" button.
  • When prompted by the utility specify a complex password that will be used for MailEnable service accounts and click "OK".
  • Once the utility has completed open up a browser and try to access the web mail client and web administration client to see if the 401 error has been rectified.

Product:MailEnable (All Versions)
Class:PRB: Product Problem or Issue
Revised:Monday, December 5, 2016