Unable to create Mailbox on a Plesk for Windows server: Unable to update the mail account properties: mailmng failed: MEAOAU.Login.AddLogin failed

Symptoms

• Attempting to create a mailbox on a Plesk for Windows server completes with an error:

  An error occurred during mail account creation: Unable to update the mail account properties: mailmng failed: MEAOAU.Login.AddLogin failed for name=jdoe and domain example.com [example.com]
  at (MailEnable::MailEnableMailName::MailEnableMailName line 43)
  at Unable to execute console command: '--add-mailname'(vconsoleapp::start line 95)
  at Unable to execute command: '"C:\Program Files (x86)\Plesk\admin\bin\mailmng" --add-mailname "--domain-name=example.com" "--mailname=jdoe"'(vconsoleapp::run line 117)
  (Error code 1)
  exit status 1

• After creation, the mailbox appears in MailEnable > Messaging Manager > Post Offices > example.com > Mailboxes marked with the red stop sign and in an attempt to open its properties the below error is shown:

  Error
  Failed to get password entry from authentication configuration store. An entry will be created for you with a random password to fix this error. You should enter a new password when possible.

• Migration where the server is target of domains with mailboxes fails with a similar error.

• MailEnable Enterprise Edition is installed on the server.

Cause

Too strict security settings in MailEnable Enterprise edition.

Such behavior was confirmed as Plesk bug with ID PPPM-11921 and Plesk Migrator extension bug with ID PMT-4837.

Resolution

1. Log into Plesk

2. Go to Domains > example.com > Mail tab > Mail Accounts and remove the affected mailbox from Plesk

3. Connect to the server via RDP

4. Start MailEnable management console at Windows Start > All Programs > MailEnable

5. From MailEnable console go to Servers > right-click on localhost > properties > Policies tab

6. Disable the options Lock out user for one hour after and Enforce password policy and apply changes

7. Re-create the mailbox in Plesk

8. For migration cases, additionally, re-migrate the affected subscription