Lotus Notes to Office 365 Migration
HCL Notes/Domino (IBM Lotus Notes) → Microsoft 365 — the hardest email migration there is. NSF mail files, recurring meetings, mail-in databases, and a real strategy for Notes applications. Specialist tooling, staged batches. Experience is the product here.
BitTitan Certified · Zero Data Loss Record · DNS Handled
Every mailbox. Every folder. Verified.
What staying actually costs.
HCL support costs climb while Notes admins retire faster than they’re replaced. Every year the migration gets harder and the people who can run Domino get scarcer.
Notes doclinks break unless deliberately rewritten — we convert them to attachments or SharePoint links by policy, not by accident.
Recurring meetings are the #1 fidelity risk in Notes migrations. We verify them explicitly, meeting-by-meeting — not statistically.
Mail migration doesn’t touch Notes apps. We inventory every app and deliver a retire / rebuild / retain roadmap as part of the project.
Everything handled. Nothing assumed.
Notes-aware server-side tooling
Quest-class connectors read NSF server-side and write to Exchange Online with fidelity mapping for Notes rich text, doclinks, and encrypted items.
Recurring-meeting verification
Every recurring meeting is individually verified post-migration — the item type where Notes migrations go wrong, handled as a first-class step.
Mail-in databases → shared mailboxes
Notes mail-in databases become Microsoft 365 shared mailboxes with delegation mapped to the equivalent access lists.
Directory workstream
Domino Directory → Entra ID mapping runs as its own planned workstream: names, groups, and mail routing reconciled before mailbox data moves.
Notes application triage
Every Notes app inventoried and classified: retire, rebuild in Power Apps/SharePoint, or retain on a small app-only Domino server. Roadmap included.
Staged batches + coexistence
SMTP coexistence keeps mail flowing between migrated and unmigrated users during the staged rollout — no big-bang risk on a 100-user Domino estate.
Assess. Plan. Migrate. Cutover.
Assess
1-2 days · Source audit, mailbox inventory, domain list. Fixed per-user quote in 24-48 hours.
Plan
1-2 days · Microsoft 365 tenant provisioned, domains verified, MFA + security baseline deployed.
Migrate
Background · Server-side pre-stage sync runs invisibly. Users keep working on the old system until cutover.
Cutover
2-4 hrs off-hours · MX/SPF/DKIM flip, final delta sync, Autodiscover repoint. 30 days hypercare.
The engineers on your project.
No outsourced ticket triage. The same three engineers handle source assessment, tenant provisioning, cutover night, and post-migration support on every HCL Notes engagement.
Sreenivasa Reddy
Founder & Principal Migration Engineer
MCSE Messaging · 25 yrs · 500+ migrations led
Owns the discovery call and migration architecture: source assessment, licensing right-size, and the compliance/security mapping that decides which M365 SKU mix you actually need.
Roshan Pujari
Senior Migration Engineer · Source Systems Lead
Microsoft Certified · M365 Administrator
Runs source-side assessment and extraction: credentials, throttling strategy, batch design, and the pre-stage sync that makes cutover weekends boring.
Bhargav
Senior Migration Engineer · Mail Flow + Cutover
Microsoft Certified · Exchange + M365 Messaging
MX/SPF/DKIM/DMARC cutover and Autodiscover repoint. Owns the 2-4 hour cutover window plus post-cutover Outlook profile and mobile device resync.
The HCL Notes-specific realities.
Generic migration guides skip these. They are the operational details that decide whether your cutover weekend is boring — which is the goal.
Notes doclinks break unless rewritten — we convert them to attachments or SharePoint links by an agreed policy
Personal archives are the Notes version of PST sprawl — local NSF archives on workstations get a collection pass so history isn’t left behind
Old post offices on legacy infrastructure migrate via a staged extraction server we stand up — production Domino is never the bottleneck
Frequently Asked Questions
How long does a Lotus Notes to Office 365 migration take?+
What happens to our Notes applications?+
Which Domino versions do you support?+
What is the downtime during a HCL Notes to Microsoft 365 migration?+
Is there any risk of data loss?+
What does the migration include for $15/user?+
Notes had a good run. It’s over.
$15/user flat. Pre-staged sync, off-hours cutover, DNS handled, 30-day hypercare. Zero data loss record across 1.4M users.
Microsoft Solutions Partner · BitTitan certified · Fixed-fee · 500+ migrations
Migrations Hub
All migration practices — platforms, pricing, timelines.
Learn More →Microsoft 365 Migration
Email, OneDrive, Teams, SharePoint — all sources.
Learn More →IMAP → M365
Any IMAP server — the generalist migration path.
Learn More →Migration Calculator
Instant estimate for your user count and data.
Learn More →Cloud Migration Strategies & Step-by-Step Guides
50 Cloud Migration Statistics for 2026 — Success & Failure Rates
A comprehensive roundup of 50 cloud migration statistics for 2026 covering success rates, failure causes, migration costs, timelines, repatriation trends, and multi-cloud strategy data from Gartner, IDC, Flexera, and Forrester.
55 Cloud Computing Statistics for 2026: Spending, Migration & Adoption
55 cloud computing statistics for 2026 covering global spending ($679B), migration timelines, multi-cloud adoption, data center investment, and SMB cloud budgets with sourced data.
Google Workspace to Microsoft 365 Migration: The Complete 2026 Playbook (Gmail, Drive, and Shared Drives)
A step-by-step migration playbook for moving from Google Workspace to Microsoft 365 covering Gmail to Exchange Online, Drive to OneDrive/SharePoint, identity migration, DNS configuration, and post-migration security — with tool comparisons and timeline estimates.
Case study: Hosting panel-based IMAP to Microsoft 365 Migration for government services in Virginia
Client overview A government services agency in Virginia, with over 1,000 employees, had been using a hosting panel-based IMAP system for their email and communication needs. As the agency grew, they faced challenges in managing email effectively, ensuring data security, and fostering collaboration across teams. Given the critical nature of their services, the agency needed a […]