MailEnable Administrator console:Unable to load DLL 'MEAISO.DLL': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

Symptoms

Unable to open MailEnable Administrator console. The following error is shown:


CONFIG_TEXT: Unable to load DLL 'MEAIPO.DLL': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
Unable to load DLL 'MEAISO.DLL': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

Cause

The MailEnable related environment variable is missing in PATH.

Resolution

It is required to add these variables to PATH. 

1. Log into the server via RDP.
2. Open Server Properties > Change Settings > Advanced System Settings > Environment Variables
3. Select PATH in System Variables > Edit
   
   
4. Add the path to MailEnable binary directories there. For example, on Plesk Onyx that was not upgraded from previous versions, the following path should be added:

   PLESK_INFO: C:\Program Files (x86)\Plesk\Mail Servers\Mail Enable\Bin64;C:\Program Files (x86)\Plesk\Mail Servers\Mail Enable\Bin

5. Restart all related MailEnable services:
   

Note: The path in step 4 may vary based on the upgrade history or installation specifications. Adjust it accordingly.

Additional Information

MailEnable problem: Unable to load DLL 'MEAISO.DLL': The specified module could not be found. (Exception from HRESULT: 0x8007007E)"