Domain mail services configuration error on Plesk server: "mailmng failed: MEAOSM.Domain.GetDomain failed"

Symptoms

When trying to change domain mail settings, select webmail, the following errors occur:

PLESK_ERROR: Operation failed
The operation you were performing failed. You can retry the operation with or without changing its parameters.
You may also want to report this problem to our support so that we could help you as soon as possible.
MEAOSM.Domain.GetDomain failed (Error code 1)

PLESK_ERROR: Error: mailmng failed: MEAOSM.Domain.GetDomain failed at (MailEnable::openDomain line 87)
at execute console command --turn-on-domain(vconsoleapp::start line 122)
at execute "C:\Program Files (x86)\Parallels\Plesk\admin\bin\mailmng" --turn-on-domain "--domain-name=example.com"(vconsoleapp::run line 139)
(Error code 1)

PLESK_ERROR: mailmng failed: MEAOSM.Domain.GetDomain failed at (MailEnable::openDomain line 87) at execute console command --set-discard(vconsoleapp::start line 93) at execute C:\Parallels\Plesk\admin\bin\mailmng --set-discard "--domain-name=example.com"(vconsoleapp::run line 110) (Error code 1)

Cause

Postoffice in MailEnable is corrupted/missing.

Resolution

1. Connect to the server via RDP

   Note: if direct RDP access to the server is not possible, contact server administrator for further assistance.

2. Open MailEnable Administrator ( Start > All Programs > Mail Enable > MailEnable Administrator ).
3. Go to Messaging manager > Post Offices
   • Create PostOffice example.com
   • Create Domain example.com

4. Open Command Prompt as Administrator and run the following command:

   For one domain:

   C:\> plesk repair mail example.com

   For all domains:

   C:\> plesk repair mail

5. Re-run failed operations.