Univik ArcMail Defender Converter Univik ArcMail Defender Converter

Excellent Excellent 4.8 TrustRating (412 Verified Reviews)

Convert ArcMail Defender EML ZIP Exports to Any Format

Professional Windows software to convert ArcMail Defender EML ZIP archive exports — multi-chunk ZIP files, per-user folder structure and export summary file — to MBOX, MSG, PDF, HTML and 10+ formats. Reads the export summary CSV automatically. Auto-merges chunked ZIPs with complete metadata and attachment preservation.

  • Reads ArcMail EML+ZIP exports directly — including multi-chunk archives and the export summary CSV.
  • Converts to Outlook PST, MBOX, MSG, PDF, HTML and 10+ output formats.
  • Chunked ZIP merging — auto-merges all export parts into one unified output without manual reassembly.
  • 100% offline — ArcMail export data never leaves your machine.

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*Free trial converts first 25 emails per archive. Upgrade for unlimited conversion.

Univik ArcMail Defender Converter

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Certified Clean by 70+ Antivirus Engines. No malware, spyware or adware.

EML+ZIP Input
10+ Export Formats
Attachments Preserved
Folder Structure
100% Offline

 What Gets Preserved

Everything Your ArcMail Defender Archive Contains

Every piece of information in your ArcMail Defender export is carried through to the output format without loss.

 Key Features

Built Specifically for ArcMail Defender Archive Exports

Every feature is designed around how ArcMail Defender structures its archive exports.

Chunked ZIP Archive Handling

ArcMail Defender delivers large exports as multiple chunked ZIP files (e.g., export_part1.zip, export_part2.zip). The converter loads all chunks at once and merges them into a single unified output automatically. No manual chunk extraction or reassembly required.

Original Folder Structure Preserved

ArcMail exports preserve the original mailbox folder hierarchy inside the ZIP. The converter reads the EML sub-folder structure and recreates Inbox, Sent Items, Drafts, Deleted Items and all custom folders exactly in the output format, whether PST, MBOX or EML.

Export Summary File Integration

ArcMail includes an export summary CSV or TXT file listing every message in the export. The converter reads this summary and cross-references it with the converted output to confirm completeness. Any messages listed in the summary but absent from the output are flagged for investigation.

Batch Multi-User Conversion

Load all per-user ZIP archives exported from ArcMail at once. Converts every user's archive in a single pass producing one PST, MBOX or other output file per user. Scales from small SMB deployments to mid-market organisations with hundreds of mailboxes.

EML to PST Conversion

ArcMail EML files cannot be opened directly in Outlook. The converter converts ArcMail EML exports to fully importable PST files with all messages, attachments, headers and folder structure preserved. No Outlook installation required on the conversion machine.

100% Offline Processing

Runs entirely on your Windows PC after downloading the ArcMail export. No ArcMail appliance connection, no admin portal login and no internet access required. All conversion is local. Email data never leaves the secure conversion environment.

Full Header Preservation

All RFC 5322 email headers survive conversion: standard headers, ArcMail-added X-headers, original routing headers from the source mail server and anti-spam results. Preserved for legal admissibility and forensic investigations.

Preview with Folder Navigation

Browse the full folder tree of any ArcMail export before converting. Navigate Inbox, Sent, custom folders. Apply date range or sender filters. Verify message counts per folder before committing to conversion.

M365 Import Ready

PST output imports directly into Microsoft 365 via the M365 Import Service (network upload or drive shipping). Per-user PST files map to per-user M365 mailboxes for seamless ArcMail-to-M365 migration.

Google Workspace Ready

MBOX output imports directly into Google Workspace using Google's migration tools or BitTitan, AvePoint and similar tools. ArcMail folder labels preserved in MBOX output for correct label assignment in Google Workspace.

Conversion Report

Generates a detailed report after every conversion listing messages processed per user, export summary match status, attachment counts and any chunk-merge errors. Provides the documentation trail for ArcMail decommissioning projects.

No ArcMail Appliance Required

No ArcMail Defender appliance, admin portal login or ArcMail client software needed on the conversion machine. Reads ArcMail ZIP export files as standalone archives. The ArcMail appliance can be offline or decommissioned before conversion.

 Complete Preservation

Every Field Preserved

All message metadata, headers and structural information carried intact from ArcMail Defender to your target format.

EML files from ZIP chunks
Folder hierarchy (all levels)
Inbox, Sent, Drafts, Deleted
Custom folder names
Export summary metadata
Attachments (all types)
Inline images
RFC 5322 headers
ArcMail X-headers
Message-ID & threading
Sent/Received timestamps
CC and BCC recipients
Anti-spam results
Routing headers
Conversation threads
Contact cards

 How It Works

Convert Your ArcMail Defender Archive in 4 Steps

From ArcMail Defender export to your chosen format in minutes.

1

Export from ArcMail Defender

Log into the ArcMail admin portal, go to Archive Search or User Management, select the users or date range, click Export and choose EML format. ArcMail packages the export as ZIP files (chunked for large exports). Download all chunks.

2

Collect ZIP Files

Download all ZIP chunks from the ArcMail portal. Save them to a single folder on your local machine along with the export summary file included in the download.

3

Load into Converter

Open Univik ArcMail Defender Converter, click Add Files or Add Folder and select all ZIP chunks plus the export summary file. The converter handles chunk merging automatically.

4

Choose Format and Convert

Select PST, MBOX, EML, PDF or any of 10+ output formats. Click Convert. One output file per user, folder structure preserved.

 Platform Compatibility

Works With All Major Platforms

Output files open directly in all major email clients and import into all cloud migration platforms.

📮

Microsoft Outlook

2010–2024

☁

Microsoft 365

Exchange Online

💌

Thunderbird

All versions

📈

Google Workspace

Gmail import

🏠

Apple Mail

macOS & iOS

🔎

eDiscovery Platforms

Relativity, Nuix

📄

PDF Viewers

Adobe, Foxit

🔌

Migration Tools

BitTitan, AvePoint

 Why Convert

Why IT Teams Choose Univik

Purpose-built for enterprise ArcMail Defender migrations and eDiscovery workflows.

📦

Chunked ZIP Native

Loads ArcMail's multi-chunk ZIP exports directly and merges them automatically. No manual extraction or reassembly needed.

📄

Export Summary Validation

Cross-references every converted message against the ArcMail export summary. Completeness confirmed before decommissioning.

📂

Folder Structure Intact

All custom folders, Inbox, Sent and Drafts recreated exactly in the output. Messages land in the right place in Outlook or Google Workspace.

🔒

Offline & Secure

No ArcMail appliance access after export. Fully standalone on any Windows machine.

✅

EML to PST Direct

Most common ArcMail migration path handled in one step. No intermediate tools or manual EML import needed.

🌐

M365 & Google Ready

PST imports via M365 Import Service. MBOX imports into Google Workspace. The standard ArcMail-to-cloud migration path.

 Output Formats

10+ Output Formats

PST output imports into Outlook or the Microsoft 365 Import Service. MBOX imports into Google Workspace. PDF archiving is ideal for compliance-driven ArcMail decommissioning projects.

📊

PST

Outlook / M365

💌

MBOX

Thunderbird

📧

EML

Per message

📄

MSG

Outlook message

📄

PDF

Compliance archive

📃

HTML

Web viewable

📊

CSV

Metadata export

🔧

EMLX

Apple Mail

📅

ICS

Calendar items

🔌

VCF

Contact cards

 Professional Use Cases

Who Uses ArcMail Defender Converter

Trusted by IT administrators, MSPs, legal teams and compliance professionals worldwide.

🏚

MSPs Migrating SMB Clients

MSPs handling ArcMail Defender-to-M365 migrations. Batch convert all user ZIP exports to PST. Per-user PST files upload directly to M365 via the Import Service.

📈

SMBs Moving to Cloud

Small and mid-market businesses migrating from ArcMail Defender to Microsoft 365 or Google Workspace. Convert the full archive offline with folder structure preserved.

⚖

Compliance & Legal Teams

Converting ArcMail exports to PDF for eDiscovery or GDPR data portability requests. Export summary cross-reference confirms completeness for legal submissions.

💼

IT Administrators

IT admins decommissioning ArcMail Defender appliances. Convert multi-year archives offline before the appliance is retired from service.

📋

Forensics & Investigations

Forensic investigators converting ArcMail exports as part of internal HR investigations. Offline, non-destructive EML conversion with full RFC 5322 header chain preserved.

📚

Records Managers

Creating permanent PST or PDF archives from ArcMail for GDPR Article 17 or other data retention obligations. Folder structure preserved for long-term document management.

 Customer Reviews

Trusted by Enterprise IT Teams

Verified reviews from IT administrators and compliance professionals.

“
★★★★★

Migrated 120 ArcMail users to Microsoft 365 in a weekend. The chunked ZIP loading was seamless — loaded all parts at once, single PST per user output, straight into the M365 Import Service. Saved a full day of manual work compared to doing it EML by EML.

TW

Tom W.

MSP Engineer, Southeast US

“
★★★★★

Our ArcMail appliance was approaching end of life and held 6 years of archives. The export summary cross-reference confirmed zero missing messages before we powered down the appliance. Folder structure came through perfectly in Outlook.

SK

Sandra K.

IT Manager, Regional Law Firm

“
★★★★★

Used it for a GDPR data subject access request covering 4 years of archived email. PDF output with complete headers. The data protection officer approved the response on first review.

PJ

Peter J.

IT Director, Healthcare Group, Netherlands

 Simple Pricing

Choose Your License

One-time payment, lifetime license. No subscription fees. Free updates included.

Free Trial

$0

Try before you buy

  • 25 emails per archive
  • All 10+ export formats
  • Full preview features
  • No time limit
Download Free

Personal License

$29/lifetime

Most popular

  • Unlimited conversion
  • All 10+ export formats
  • 1 PC activation
  • Free lifetime updates
  • Email support
Buy Personal — $29

Business License

$99/lifetime

For MSPs & teams

  • Everything in Personal
  • 5 PC activations
  • Commercial use allowed
  • Priority phone support
  • Volume discounts available
Buy Business — $99

 Help Desk

Frequently Asked Questions

Common questions about converting ArcMail Defender email archive exports.

ArcMail Defender's primary export format: EML+ZIP — EML files packaged in ZIP archives, one per user, preserving the original mailbox folder hierarchy in sub-directories. For large mailboxes ArcMail delivers the export in multiple chunked ZIP files (export_part1.zip, export_part2.zip, etc.). The converter loads all chunks simultaneously and merges them automatically. It also reads the export summary file included in the download to cross-reference completeness.

Automatically. ArcMail delivers large exports in multiple ZIP chunks to keep individual file sizes manageable. The converter detects all ZIP parts in the selected folder, reads them simultaneously and merges the content into a single unified output — one PST, one MBOX or one folder of EML files per user. No manual extraction, no file renaming and no chunk reassembly required.

Yes — this is the most common ArcMail migration request. ArcMail EML exports cannot be opened directly in Outlook. The converter converts ArcMail EML ZIP archives to fully importable PST files with all messages, folder structure and headers preserved. PST files upload directly to M365 via the Import Service (network upload or drive shipping). One PST per user maps to one M365 mailbox.

Yes, completely standalone. Once you have downloaded the ZIP exports from the ArcMail admin portal, no ArcMail Defender appliance, admin portal login or ArcMail client software is needed. Conversion runs entirely on your Windows machine. This is particularly important for end-of-life appliance migrations where the ArcMail hardware may be retired during the migration project.

Yes. ArcMail exports preserve the original mailbox folder hierarchy inside the ZIP — Inbox, Sent Items, Drafts, Deleted Items and all custom folders. The converter reads this sub-folder structure and recreates it exactly in the output. In PST output, users find their archived emails in the correct Outlook folders. In MBOX output, folder names are preserved as labels for Google Workspace import.

ArcMail includes a summary file (CSV or TXT) in every export listing every message with its sender, recipient, date, subject and size. Univik ArcMail Defender Converter reads this summary and cross-references it with the converted output. Any message listed in the summary but absent from the output is flagged in the conversion report. This completeness verification is essential before decommissioning the ArcMail appliance.

Yes. Convert ArcMail EML ZIP archives to MBOX format. MBOX output imports directly into Google Workspace using Google's migration tools or third-party tools like BitTitan. One MBOX per user ZIP maps to one Google Workspace mailbox. ArcMail folder names are preserved as MBOX labels for Google Workspace import.

Minimal requirements:

  • OS: Windows 11, 10, 8.1, 8 or 7
  • RAM: 4 GB minimum (8 GB recommended for large multi-user exports)
  • Disk: 50 MB installation plus space for output files
  • Framework: .NET Framework 4.8 or higher

No ArcMail client, Outlook or internet connection required.

Free trial converts the first 25 messages per archive. All features fully functional: chunked ZIP loading, folder structure preservation, export summary reading, all 10+ output formats and preview. No time limit.

Steps: (1) Log into the ArcMail admin portal, (2) Go to Archive Search or Users, (3) Select the users to export, (4) Set date range if needed, (5) Click Export and choose EML format, (6) Wait for the export job to complete, (7) Download all ZIP chunks and the export summary file, (8) Load into Univik ArcMail Defender Converter. For large organisations, export by department to keep individual ZIP archives manageable.

Still have questions? Contact support or Live Chat

Ready to Convert Your ArcMail Defender Archive?

Download the free trial and join thousands of IT professionals who trust Univik for ArcMail Defender email archive conversion.

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✓ Free trial (25 emails)   ✓ No credit card required   ✓ Instant download   ✓ Windows 7–11