A Practical Cloud Migration Guide for Long Island Small Businesses
What "cloud migration" actually means
For most Long Island SMBs, cloud migration means three projects, often run in sequence:
- Email to Microsoft 365 or Google Workspace (4–8 weeks)
- File server to SharePoint, OneDrive, or Google Drive (8–16 weeks)
- Line-of-business apps to SaaS or Azure/AWS (varies wildly)
Email migration
Cleanest of the three. Most under-50-user shops can cut over a weekend. Allow 4 weeks of prep: assess current Exchange or POP/IMAP setup, set up Microsoft 365, configure DNS, run pilot for IT and select power users, train, then cut over.
Common gotcha: shared mailboxes. They don't migrate the way personal mailboxes do, and the new permissions model surprises people.
File server migration
Hardest of the three. SharePoint and OneDrive don't behave like a shared drive. The folder structure that worked for 12 years on a Windows server probably doesn't fit SharePoint's permission model. Plan a permissions cleanup as part of the migration; resist the urge to lift-and-shift the existing structure.
Timeline: 8–16 weeks for a shop with under 5 TB of data and standard departmental sharing.
Line-of-business migration
This depends entirely on the application. QuickBooks Desktop to QuickBooks Online is a few hours. A custom Access database used by accounting since 2001 might be a 6-month rebuild. Scope this as a separate engagement, never as a casual addition to email and file migrations.
Real costs
For a 25-person Long Island business:
- Email + Microsoft 365 setup: $4,000–$7,500 one-time
- File server to SharePoint: $6,000–$15,000 depending on data volume
- Recurring Microsoft 365 licenses: $2,000–$3,500 per month for Business Premium
Things to fight for during the migration
- Schedule cutovers outside business hours, always
- Keep the old system in read-only mode for 30 days post-cutover
- Document the decisions, not just the configuration — "why did we do it this way" matters in two years
- Train end users before the cutover, not the day of
When cloud is the wrong answer
Some workloads still belong on-prem: legacy industrial control systems, line-of-business apps with hardware dongles, and anything where bandwidth costs would explode. We've helped clients un-migrate from cloud back to on-prem when the math didn't work. The cloud is a tool, not a religion.
