Univik Email Archive Converter
Univik Email Archive Converter exports mailboxes and journal data from Mimecast, Enterprise Vault, MailStore, Google Vault and 20+ other archiving platforms into PST, PDF, EML, MSG and more on your local Windows machine. Every email, folder, attachment and metadata field is preserved. Built for archive migration, decommissioning and compliance export.
*Free trial converts the first 10 emails per folder. No registration required.
Trusted for NAS Email Migration
IT teams, compliance officers and legal staff use Univik to migrate, decommission and export email archives from any major archiving platform.
Archive Data Preserved
From
Sender
To
Recipients
Subject
Email Title
Date
Timestamp
Body
Full Content
Attachments
All Files
CC / BCC
All Recipients
Folders
Full Hierarchy
Message-ID
Unique ID
Headers
All RFC Headers
HTML Body
Rich Content
Flags
IMAP Flags
Key Features
Built for IT teams, compliance officers and legal staff migrating, decommissioning or exporting enterprise email archives.
One tool reads exports and stores from Mimecast, Veritas Enterprise Vault, MailStore Server, Google Vault, Microsoft Purview, Proofpoint, Barracuda and many more. Whatever archive you run, you get the same PST, PDF and EML output without a separate utility for each platform.
Archives keep mail in per-user mailboxes with Inbox, Sent, Drafts and custom folders, often across thousands of accounts. Univik Converter reads the full hierarchy and recreates it in the output. PST output mirrors it as Outlook folders. EML output creates matching directories. No emails are ever merged or flattened.
Point Univik Converter at the exported archive and run it once. Every mailbox and journal store is processed in sequence and generates its own output file. For archives with hundreds of accounts and years of mail, this removes the manual effort of exporting one mailbox at a time.
All file attachments are extracted from the archive and embedded in the output. Email metadata including From, To, CC, BCC, Subject, Date, Message-ID and all RFC 5322 headers is preserved exactly as stored. Nothing is lost or stripped, which matters when the export has to stand up in an audit.
Convert only emails within a specific date range, from specific folders or matching a subject keyword. Filters let you extract only the legally required emails for a compliance request or only the last six months of a departing employee's inbox rather than their entire seven-year email history.
Business email archives hold years of sensitive communication. Univik Converter processes every archive file locally on your Windows machine. No emails are transmitted to any server, no cloud processing occurs and no internet connection is required. The conversion log records every file processed for internal audit purposes.
Export Formats
Every output format for your migrated email archive. Import into a new mail system, produce a compliance copy or open the mail in any client.
Email Client Formats
Document and Archive Formats
Web and Structured Formats
All 20+ formats available in the full version. View the complete format list on the Univik Email Converter page.
Univik exports mailboxes and journal data from every major archiving platform. Pick your source for a step-by-step guide.
Converting individual email files or a desktop client mailbox instead? Use the Univik Email Converter.
Data Integrity
Every element of your archived email is carried through the migration without modification.
Simple Pricing
One-time payment. Lifetime license. No subscription. Free updates included.
How It Works
Export the archive, convert on Windows, import into your destination system.
Use your archive platform's export or backup option to get the mailboxes out as files or copy the on-disk store. Move the exported data to a Windows PC and keep the folder structure intact for accurate mailbox identification. The platform guides below cover the exact steps for each system.
Most archives export as PST, EML, MBOX or an on-disk mail store that Univik reads directly.
Open Univik Email Archive Converter. Browse to a single mailbox or the full exported archive for batch processing. Preview shows message counts, folder structure and date ranges for each mailbox. Apply any date, sender or folder filters needed before conversion.
Select output format and destination folder. Click Convert. Each mailbox generates its own output file. Import PST files directly into Outlook or Microsoft 365. Move EML files into Thunderbird or any IMAP server. Send PDF archives to your compliance storage.
Use Cases
The migration, compliance and legal situations Univik Email Archive Converter is built for.
When an archiving platform reaches end of life or its licence renewal is too costly, you need every mailbox out before it is switched off. Univik exports the whole archive to PST or EML so the historical mail stays accessible once the platform is gone.
Moving from a legacy archive to Microsoft 365, Google Workspace or a new archiving system needs the old mail in PST or EML for import. Univik produces import-ready output for the major migration tools with no intermediate reformatting step.
Regulated industries must retain mail for three to seven years in a readable, tamper-evident form. Converting the archive to PDF creates a self-contained record with every header and metadata field intact for audit and retention schedules under SEC, FINRA, HIPAA or GDPR rules.
When litigation or an investigation hits, legal teams need the responsive mail pulled from the archive with full metadata and a chain-of-custody log. Univik exports a date and custodian scoped set to PDF or PST so it is ready for review and disclosure.
Proprietary archive stores trap your mail in formats only that vendor can read. Univik converts those stores into open PST, EML and PDF so you own your data and stay free to move it anywhere, anytime.
Archive Migration Reference
What an email archive is, why exporting one is hard and how the conversion process works.
An email archive is a separate store that keeps a copy of every message an organisation sends and receives, often for years, to meet retention, compliance and eDiscovery needs. Archives run as on-premise appliances, hosted cloud services or journaling targets attached to a mail server.
Most archives lock mail into a proprietary store and offer only slow per-user export. Email archive migration means getting that mail back out into open formats like PST, EML and PDF so it can move to a new system or live as a standalone record. That is the job Univik does for 20+ platforms.
| Source systems | Mimecast, Enterprise Vault, MailStore, 20+ more | |
| Native storage | Proprietary archive stores, journals, NAS mail | |
| Input accepted | PST, EML, MBOX, MSG and on-disk stores | |
| Output formats | PST, PDF, EML, MSG, MBOX, HTML | |
| Metadata kept | Headers, dates, Message-ID, attachments | |
| Built-in bulk export | Rare; usually slow per-user only | |
| Best for review | PDF with a CSV index file | |
| Processing | 100% offline on your Windows PC | |
Email Archive Landscape
Email archives come in a few shapes. On-premise appliances and software vaults store mail on your own servers. Cloud and hosted services keep it offsite. Journaling captures a copy of every message at the mail server. NAS boxes now run small mail servers too. Univik reads all of them and writes open formats.
Archive Types
Why Univik
Univik has been building email archive converters since 2013. This archive converter sits at the centre of a toolkit that covers Mail Assure, Mimecast, Google Vault and 20+ other email archive formats.
Customer Reviews
Rated 4.8 out of 5 by verified users including system administrators, compliance officers and IT managers who migrated and exported email archives.
"We retired a 6-year-old Enterprise Vault store and exported every mailbox to PST before the licence lapsed. Univik handled the whole archive in a weekend and the folder structure came through perfectly."
"Our auditor wanted 5 years of archived mail as PDF with full headers. We exported a date-filtered set from MailStore and every PDF had exactly what they needed."
"We moved off Mimecast to Microsoft 365 and needed the historical archive in PST. Converted 40 mailboxes and imported straight into Exchange Online with no reformatting."
FAQs
Answers to what IT, compliance and legal teams ask most about email archive conversion.
Free trial. No NAS required. No registration. Your emails stay on your machine.
Windows 7, 8, 10, 11 | 100% offline | 30-day money-back guarantee
Written by Univik Research Team
The Univik Research Team has been building email archive conversion software since 2013. Our engineers work with MBOX, PST, EML, MSG and all major email archive formats. This page covers email archive migration and conversion across 20+ archiving platforms, tested against real exports and on-disk stores from cloud, on-premise and NAS archives. For professional email migration assistance, see our email migration service.
Related converters: Mail Assure | Mimecast | Google Vault | MailStore Server
Univik Email Archive Converter
Archive Data Preserved
Data Integrity
Simple Pricing
How It Works
Use Cases
Archive Migration Reference
Why Univik
Customer Reviews
FAQs