IBM/HCL Notes (NSF) Migration — Tool-Based or IMAP — to Jatheon Cloud

This guide explains how to migrate data from IBM/HCL Notes (NSF) using either a third-party migration tool or the manual IMAP method. It covers prerequisites, Domino and Office 365 preparation, batch mapping, syncing, and verification. If your destination is Jatheon Cloud, use the tool-based export (EML/MSG) or Exchange/EWS path for ingestion, as described below.

Prerequisites

• Create a full backup of your NSF files (and Domino data) before changes.
• Admin access to Domino Administrator and (if applicable) the Office 365 tenant.
• List of users/custodians and a CSV mapping plan (source NSF → destination mailbox).
• Network reachability for IMAP/SSL (143/993) if using IMAP.
• Access to your Jatheon Cloud tenant (if ingesting to Jatheon Cloud after export).

Using a Migration Tool

1. Backup — Create a backup of all .nsf stores.
2. Install Tool — Install the chosen third-party NSF migration tool on a staging host.
3. Source Selection — Add local .nsf files or connect to the Domino server as the source.
4. Map Data — Prepare a CSV mapping: each source NSF to its destination mailbox (Office 365 or staging account).
5. Filters — (Optional) Select date/folder filters, skip deleted/spam, etc.
6. Start Migration — Run batches; monitor logs for failures and throttling.

Sample CSV header (adjust fields to your tool’s schema):

Using the Manual IMAP Method

1. Backup — Create a backup of your .nsf files first.
2. Enable IMAP in Domino — In Domino Administrator → Configuration → Servers → Server Document, open Ports → Internet Ports → Mail and enable the IMAP TCP/IP port. Save and restart the Domino server for changes to apply.
3. Verify IMAP Access per User — In Notes client: File → Preferences → Mail, confirm IMAP is enabled as required.
4. Prepare Office 365 — In the Microsoft 365 Admin Center, create an IMAP migration endpoint (server name, port 993, SSL) pointing to Domino.
5. Sync Data — Use the O365 IMAP migration wizard or a tool with IMAP support to sync emails from Notes to Office 365.

Validation & Cutover

• Compare item counts and sizes between source and destination (per user/folder).
• Spot-check headers (From/To/Cc, Subject, Date), attachments, and time-zone accuracy.
• Validate search parity (keywords/date range/sender filters).
• Confirm retention/hold mapping (if migrating to Jatheon Cloud after export).
• Schedule final delta sync and perform the cutover window.

Post-Migration Experience

• Office 365 — Verify mailbox policies, retention, and user sign-in.
• Jatheon Cloud — Run full-text search checks, enable retention/legal holds, and confirm audit trails.