if you are searching for mention error is a subject line, which simply means you might want to move the enterprise vault task to the another server or trying to create new task but old entry is still present in SQL table.

Error:-

Log Name:      Symantec Enterprise Vault

Source:        Enterprise Vault

Date:          9/23/2017 11:12:56 AM

Event ID:      3333

Task Category: Journal Task

Level:         Error

Keywords:      Classic

User:          N/A

Computer:      enterprisevaultservername.domain.com

Description:

This mailbox has duplicate entries in the directory and cannot be processed.

LegacyDN:

/O=LOGISTICS/OU=EXCHANGE ADMINISTRATIVE GROUP (xxxxxxx)/CN=RECIPIENTS/CN=JOURNALmailboxname

DefaultVaultID:

[Not Set]

Solution:-

first identified a correct directory database, below query have to run on directory database

Find entry and identified with vaultID in , As you can see in error above in my case vaultid was not set so i have decided to deleted same entry

select * from exchangeMailboxentry where mbxdisplayname = ‘JOURNALmailboxname’

To check the available entry for vault id

select * from exchangeMailboxentry where defaultvaultid = ‘156F20DF15684D845A869655D4C604B091110000eVaultApp01’

Query to delete from old exchangemailboxentry

where exchangemailboxentryid = ‘1F036D13E2B6F5C4C9717D1B30AD162D11n10000eVaultApp01’