How long does email migration take?

Individual mailboxes take 2-5 business days. Small businesses (up to 10 mailboxes) take 3-7 days. Medium organizations (10-100 mailboxes) take 1-2 weeks. Enterprise migrations (100+ mailboxes) take 2-4 weeks. Rush service with 48-hour turnaround is available.

Will I lose any emails during migration?

No - we guarantee 100% data integrity. Our process includes pre-migration audits, post-migration verification, and delta synchronization. We never delete source data until you confirm successful migration.

Is my email data secure during migration?

Yes. We use AES-256 encryption for all data transfers. Data is processed in isolated secure environments. We sign NDAs upon request and comply with HIPAA, GDPR, SOX, and other regulatory requirements.

Can you migrate calendar, contacts, and tasks?

Yes. We provide complete PIM migration including calendar events with recurring appointments, contacts with all fields including photos, tasks with due dates and priorities, notes, and journal entries.

What is the best way to migrate emails to Office 365?

The best method depends on your source system. For Exchange servers, we use hybrid or cutover migration. For IMAP servers, we use the Microsoft 365 migration endpoint. For PST files, we use Azure AzCopy upload. For Google Workspace, we use API-based migration.

Can you migrate emails from a crashed or dead server?

Yes. We specialize in recovering and migrating data from failed servers. If you have database files (EDB for Exchange, NSF for Notes) or backup files, we can extract and migrate the data even if the server is no longer running.

Do you migrate shared mailboxes and distribution lists?

Yes. We migrate all mailbox types including shared mailboxes, resource mailboxes, distribution lists, security groups, and public folders. Permissions and membership are preserved.

Will there be any downtime during migration?

Minimal to zero downtime. We use delta/incremental synchronization - first migrating historical data while your system stays operational, then running a final sync before cutover. The actual cutover typically takes 15-30 minutes.

Email Migration Services - Server, Cloud & Client Data Migration

Supported Platforms

Exchange

Office 365

Gmail

Zimbra

Lotus Notes

GroupWise

MDaemon

Kerio

Postfix

Thunderbird

50+

Email Platforms

5,000+

Migrations Done

100M+

Emails Migrated

2013

Since

100% Data Integrity

AES-256 Encrypted

12+ Years

Worldwide Service

5000+ Migrations

Email Servers

Supported Email Servers

We migrate data from all major email servers - both on-premise and hosted.

Microsoft Email Servers

Exchange & Office 365

Exchange 2019

Exchange 2016

Exchange 2013

Exchange 2010

Exchange 2007

Office 365

Microsoft 365

Exchange Online

IBM / HCL Servers

Lotus Notes & Domino

HCL Notes 12

HCL Notes 11

Lotus Notes 9

Lotus Notes 8.5

Domino Server

HCL Domino

Notes 7.x

Notes 6.x

Linux / Open Source

Postfix, Dovecot & More

Zimbra

Postfix

Dovecot

Sendmail

Exim

Qmail

Cyrus IMAP

Mailcow

Commercial Servers

MDaemon, Kerio & More

MDaemon

Kerio Connect

GroupWise

hMailServer

SmarterMail

MailEnable

IceWarp

Axigen

Legacy & Regional Email Servers

Specialized & Discontinued Systems

German Systems:

Tobit DavidDavid InfoCenterDavid.fx

Legacy Systems:

FirstClasscc:MailMicrosoft MailPegasus Mail

Other Systems:

ZarafaKolabOpen-XchangeSOGo

Cloud Services

Cloud Email Services

Migrate to or from any cloud email provider with direct API integration.

Microsoft Cloud

Office 365Microsoft 365Exchange OnlineOutlook.com

Google Cloud

Google WorkspaceGmail BusinessGmail PersonalG Suite

Other Cloud

Zoho MailYahoo MailiCloud MailProtonMailFastmail

🌐 Hosted Email Services

✓ GoDaddy Email
✓ Bluehost Email
✓ HostGator Email
✓ DreamHost Email

✓ Namecheap Email
✓ 1&1 IONOS Mail
✓ Web.de / GMX
✓ Any IMAP/POP3

📡 ISP Email Providers

✓ Comcast/Xfinity
✓ AT&T Email
✓ Verizon Email
✓ Spectrum Email

✓ BT Mail (UK)
✓ Telstra (AU)
✓ T-Online (DE)
✓ Any ISP Email

Data Files

Email Client Data Files

We migrate all email client data file formats while preserving every email, attachment, and folder.

Microsoft Formats

Outlook & Windows

.PST.OST.MSG.OLM.DBX.MBX

Outlook 365, 2021, 2019, 2016, 2013, 2010, 2007 and Outlook Express

Standard Formats

Universal & RFC

.EML.EMLX.MBOX.ICS.VCF

Thunderbird, Apple Mail, Unix clients, and RFC 5322 compliant

Proprietary Formats

Vendor-Specific

.NSF.FX3.FX2.TBB.PMM

Lotus Notes, Tobit David, The Bat!, Pegasus Mail

📧 Supported Email Clients

Microsoft Outlook

Windows & Mac

Apple Mail

macOS & iOS

Mozilla Thunderbird

Cross-Platform

Windows Mail

Windows 10/11

eM Client

Windows & Mac

The Bat!

Windows

Mailbird

Windows

Postbox

Windows & Mac

Migration Scenarios

Common Email Migration Scenarios

We handle all types of email migration projects. Here are the most common scenarios we support.

Exchange to Office 365

Migrate from on-premise Exchange Server (2010, 2013, 2016, 2019) to Microsoft 365 cloud. We support cutover, staged, and hybrid migration methods.

Cutover MigrationHybrid SetupStaged Migration

Google to Microsoft 365

Migrate from Google Workspace (G Suite) to Microsoft 365. Complete transfer of emails, Drive files, calendars, and contacts with user mapping.

Gmail MigrationDrive to OneDriveCalendar Sync

Lotus Notes to Outlook

Migrate from IBM Lotus Notes/HCL Domino to Microsoft Outlook or Office 365. NSF to PST conversion with full data preservation.

NSF ConversionNotes ApplicationsArchive Migration

Office 365 Tenant-to-Tenant

Cross-tenant migration for mergers, acquisitions, or company restructuring. Move mailboxes between Microsoft 365 tenants seamlessly.

M&A MigrationTenant ConsolidationUser Provisioning

On-Premise to Cloud

Move from any on-premise email server to cloud platforms like Office 365, Google Workspace, or Zoho. Reduce infrastructure costs.

Cloud MigrationServer DecommissionCost Reduction

IMAP Server Migration

Migrate between any IMAP-compatible servers including Zimbra, Postfix, Dovecot, MDaemon, Kerio, and hosted email providers.

IMAP ProtocolAny ServerBulk Migration

PST File Import

Import PST files to Office 365, Exchange, Gmail, or any email platform. Handle large PST archives and corrupted files.

PST UploadArchive ImportCorruption Repair

Legacy System Migration

Migrate from discontinued or legacy email systems like Tobit David, FirstClass, GroupWise, cc:Mail to modern platforms.

Legacy ExportFormat ConversionData Recovery

Email Archiving Migration

Migrate email archives from Enterprise Vault, Mimecast, Barracuda, or journaling systems to new archive or live mailboxes.

Archive ExportComplianceeDiscovery

Migration Methods

Email Migration Methods Explained

We use the optimal migration method based on your source system, data volume, and business requirements.

Cutover Migration

Best for: Small organizations (<150 mailboxes)

All mailboxes are migrated at once over a weekend or during off-hours. Quick and simple approach where the entire organization switches to the new system simultaneously.

Pros: Fast, simple, single cutover point
Cons: Requires downtime window, not for large orgs

Staged Migration

Best for: Medium organizations (150-2000 mailboxes)

Mailboxes are migrated in batches over weeks or months. Allows for testing, user training, and gradual transition with coexistence between old and new systems.

Pros: Manageable batches, testing time, reduced risk
Cons: Longer timeline, coexistence complexity

Hybrid Migration

Best for: Large enterprises with compliance needs

Maintains both on-premise and cloud systems indefinitely. Users can be moved gradually while both systems work together with shared address book and free/busy.

Pros: Maximum flexibility, no rush
Cons: Higher complexity, ongoing infrastructure costs

IMAP Migration

Best for: Non-Exchange sources, ISP migrations

Uses IMAP protocol to copy emails from source to destination. Works with any IMAP-compatible server regardless of vendor. Simple but email-only (no calendar/contacts).

Pros: Universal compatibility, simple setup
Cons: Email only, slower for large mailboxes

API-Based Migration

Best for: Cloud-to-cloud migrations

Uses native APIs (Microsoft Graph, Google APIs) for direct server-to-server transfer. Fastest method for cloud platforms with full data fidelity including permissions.

Pros: Fastest, most complete data transfer
Cons: Requires API access, platform-specific

PST/File-Based Migration

Best for: Archives, offline data, legacy systems

Export data to PST, MBOX, or EML files, then import to destination. Works when direct connectivity isn't possible or for migrating archived/offline data.

Pros: Works offline, handles any source
Cons: Manual steps, requires storage space

🔄 Delta/Incremental Migration

All our migration methods support delta synchronization - we perform an initial bulk migration, then run incremental syncs to capture any new emails received during the migration period. This ensures zero data loss and minimal downtime during final cutover.

Emails Lost

Industries & Compliance

Email Migration for Regulated Industries

We understand the unique compliance requirements of different industries and ensure your email migration meets all regulatory standards.

🏥

Healthcare

HIPAA-compliant email migration for hospitals, clinics, and healthcare providers.

HIPAA Compliant

⚖️

Legal & Law Firms

Preserve attorney-client privilege with chain of custody documentation.

eDiscovery Ready

🏦

Financial Services

SEC, FINRA, and SOX compliant migrations for banks and investment firms.

SOX Compliant

🏛️

Government

FedRAMP and government security standards for public sector migrations.

FedRAMP

🎓

Education

FERPA compliant migrations for schools, colleges, and universities.

FERPA Compliant

🌍

EU & International

GDPR compliant migrations with data residency options for EU organizations.

GDPR Compliant

🏢

Enterprise

Large-scale migrations with dedicated project management and SLAs.

ISO 27001

🏪

Small Business

Affordable email migration services tailored for SMBs and startups.

Budget-Friendly

Comparison

DIY vs Professional Email Migration

Should you migrate email yourself or hire professionals? Here's an honest comparison.

Factor	DIY / Free Tools	Professional Service
Data Integrity	⚠️ Risk of data loss	✅ 100% guaranteed
Downtime	❌ Hours to days	✅ Minutes (delta sync)
Technical Expertise	⚠️ Required	✅ We handle everything
Calendar & Contacts	⚠️ Often not supported	✅ Fully migrated
Folder Structure	⚠️ May be lost	✅ Preserved exactly
Email Metadata	❌ Often lost	✅ All preserved
Large Mailboxes	❌ Timeouts & failures	✅ No size limits
Support	❌ Forums only	✅ Dedicated experts
Time Investment	❌ Days of your time	✅ We do the work
Cost	✅ Free (but risky)	💰 From $49/mailbox

Bottom Line: DIY migration works for tech-savvy individuals with small mailboxes and time to spare. For businesses, the risk of data loss, downtime, and the hidden cost of employee time makes professional migration services the smarter choice.

Get a Free Quote →

Your Concerns

Addressing Your Migration Concerns

We understand email migration can be stressful. Here's how we address common concerns.

"Will I lose any emails?"

Our Promise: 100% data integrity guarantee. We verify email counts before and after migration. Your original data is never modified or deleted until you confirm success.

"What about attachments?"

Fully Preserved: All attachments migrate with original filenames, sizes, and types intact. Embedded images and inline content preserved.

"Will folders be preserved?"

Exact Replication: Your complete folder hierarchy including nested subfolders is maintained exactly as you organized it.

"Will original dates be kept?"

Timestamp Preserved: All original sent/received dates and times maintained. Emails appear in correct chronological order.

"Is my data secure?"

Bank-Level Security: AES-256 encryption for all transfers. Isolated processing. NDA available. Data permanently deleted after confirmation.

"Will there be downtime?"

Minimal Disruption: Migrations during off-hours. Incremental sync for live servers. Most users experience less than 30 minutes downtime.

"What about read/unread and flags?"

All Metadata Preserved: Read/unread status, flags, categories, importance levels, and custom tags all migrate intact.

"Can you migrate calendar and contacts?"

Complete PIM Migration: We migrate calendars with recurring events, contacts with photos, tasks with due dates, and notes.

How It Works

Our Migration Process

A proven 6-step process that ensures smooth, successful email migration every time.

Free Migration Analysis

Share details about source and destination platforms. We provide a detailed quote within 24 hours.

Data Collection

Securely transfer your email data via encrypted upload, SFTP, API, or physical media.

Pre-Migration Audit

We count all emails, verify folder structures, and create a detailed inventory before conversion.

Migration Execution

Our tools extract, convert, and transfer all data while preserving every email and metadata.

Quality Verification

Post-migration audit compares email counts, verifies folders, and generates detailed reports.

Delivery & Support

Receive migrated data with import instructions. 30-day post-migration support included.

⏱️ Typical Migration Timeline

24hr

Free Analysis

2-5 Days

Small Projects

1-2 Weeks

Enterprise

48hr

Rush Service

Pricing

Migration Pricing

Individual

$49/mailbox

Personal migrations

✓ Single mailbox
✓ Up to 10GB data
✓ All formats
✓ 5-day delivery
✓ Email support

Get Started

Business - Popular

$299/project

Up to 10 mailboxes

✓ Up to 10 mailboxes
✓ Up to 100GB total
✓ Contacts & calendars
✓ 3-day priority
✓ Phone support

Get Started

Enterprise

Custom

Unlimited scale

✓ Unlimited mailboxes
✓ Full server migration
✓ User provisioning
✓ Project manager
✓ 24/7 support

Contact Sales

FAQ

Frequently Asked Questions

Get answers to the most common questions about our email migration services.

We support 50+ email platforms including Microsoft Exchange (2007-2019), Office 365/Microsoft 365, Gmail/Google Workspace, Zimbra, IBM Lotus Notes/HCL Domino, Novell GroupWise, MDaemon, Kerio Connect, Postfix, Dovecot, hMailServer, SmarterMail, and many more. We also handle legacy and regional systems like Tobit David, FirstClass, and cc:Mail. If your platform isn't listed, contact us - we likely support it.

We convert all major email file formats including PST, OST, MBOX, EML, EMLX, MSG, OLM, NSF, DBX, MBX, and proprietary formats like FX3 (Tobit David), TBB (The Bat!), and PMM (Pegasus Mail). We can migrate between any format combination - for example, NSF to PST, MBOX to Office 365, or PST to Gmail - while preserving all emails, attachments, folders, and metadata.

Our pricing starts at $49 per mailbox for individual migrations. Business packages start at $299 for up to 10 mailboxes. Enterprise migrations with unlimited mailboxes are custom quoted based on complexity, data volume, and timeline requirements. We offer volume discounts for large migrations. Contact us for a free, no-obligation quote within 24 hours.

Timeline depends on data volume and migration complexity. Individual mailboxes: 2-5 business days. Small businesses (up to 10 mailboxes): 3-7 days. Medium organizations (10-100 mailboxes): 1-2 weeks. Enterprise (100+ mailboxes): 2-4 weeks with phased approach. We also offer rush service with 48-hour turnaround at additional cost. Free analysis provides an accurate timeline estimate for your specific situation.

No - we guarantee 100% data integrity. Our process includes pre-migration audits (counting all emails and folders), post-migration verification (comparing counts), and delta synchronization (capturing any emails received during migration). We never delete source data until you confirm successful migration. If any discrepancies are found, we re-migrate affected data at no additional cost.

Absolutely. We use AES-256 encryption for all data transfers - the same encryption used by banks and government agencies. Data is processed in isolated secure environments with no third-party access. We sign NDAs upon request and provide certificates of data destruction after migration. Our processes comply with HIPAA, GDPR, SOX, and other regulatory requirements.

Yes. We provide complete PIM (Personal Information Management) migration. This includes calendar events with recurring appointments and reminders, contacts with all fields including photos, tasks with due dates and priorities, notes, and journal entries. All data migrates together while maintaining relationships and references between items.

The best method depends on your source system. For Exchange servers, we use hybrid or cutover migration via Exchange Web Services. For IMAP servers, we use the Microsoft 365 migration endpoint. For PST files, we use the Azure AzCopy upload method. For Google Workspace, we use API-based migration. We select the optimal approach for your situation to ensure fastest migration with complete data fidelity.

Gmail to Office 365 migration involves several steps: exporting from Google Workspace (emails, contacts, calendars, Drive files), converting label structures to folders, mapping users between systems, and importing to Microsoft 365. We handle the entire process using API-based migration tools that ensure all Gmail labels, filters, and organization are preserved in Outlook format.

Yes. We specialize in recovering and migrating data from failed servers. If you have database files (EDB for Exchange, NSF for Notes, etc.) or backup files, we can extract and migrate the data even if the server is no longer running. We've recovered emails from corrupted databases, failed RAID arrays, and servers that haven't been online for years.

Yes. We migrate all mailbox types including shared mailboxes, resource mailboxes (rooms and equipment), distribution lists, security groups, and public folders. Permissions and membership are preserved. For Office 365 migrations, we can also migrate Teams, SharePoint sites, and OneDrive data as part of a comprehensive migration.

Your source data remains completely untouched during and after migration - we only copy data, never move or delete it. After you verify the migration was successful, you decide what to do with the source system. We recommend keeping source data accessible for 30-90 days as a safety net. We can provide certificates of secure data destruction for compliance purposes when you're ready to decommission the old system.

Minimal to zero downtime. We use delta/incremental synchronization: first, we migrate historical data while your current system stays operational. Then, just before cutover, we run a final sync to capture any new emails. The actual cutover (switching MX records) typically takes 15-30 minutes. Most users don't notice any disruption. For enterprise migrations, we can perform cutover during off-hours or weekends.

It depends on the migration type. File-based migrations: Just send us your PST, MBOX, NSF, or other data files - no server access needed. Live server migrations: We can work with admin credentials, application impersonation, or delegate access depending on the platform. Cloud migrations: We typically use OAuth or admin-delegated access. We'll guide you through the minimal access required for your specific scenario.

We maintain your source data until you confirm complete success, so there's always a fallback. If any issues are found, we re-migrate affected data at no additional cost. Our 30-day post-migration support covers troubleshooting, import assistance, and any necessary corrections. For enterprise clients, we provide dedicated support with SLAs. Your satisfaction is guaranteed - we're not done until you're happy.

Success Stories

Email Migration Case Studies

Real migration projects we've completed for clients across industries.

Healthcare 2024

Regional Hospital Network

Exchange 2010 to Microsoft 365 migration for multi-site healthcare organization.

850

Mailboxes

2.1TB

Data

12 Days

Duration

Challenge: HIPAA compliance, 24/7 operations, zero downtime requirement.
Solution: Hybrid migration with weekend cutover and delta sync.

Legal 2024

International Law Firm

Lotus Notes to Office 365 migration with 15-year email archive preservation.

320

Mailboxes

4.5TB

Ready to Migrate Your Email?

Free Migration Analysis Call Now

Free Analysis 100% Data Integrity 50+ Platforms Secure

About Univik

Univik is a digital forensics and data migration company founded in 2013.

With 12+ years experience and 5,000+ successful migrations, we've helped businesses worldwide transition between email platforms seamlessly. We serve clients in 89+ countries including Fortune 500 companies, government agencies, healthcare providers, and small businesses.

Email Migration Experts

5,000+ Successful Migrations

12+

Years

5,000+

Migrations

100M+

Emails

89+

Countries

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