Most small businesses set up Microsoft 365 once, add people over the years, and never look back. Then one day there’s a security scare, a former employee who still has access, or a mailbox no one can find — and it’s a mess.

You don’t need a big IT contract to clean this up. You need a focused review. Here’s the checklist we run for South Denver small businesses.

1. Users and licenses

Remove or disable former employees who still have accounts (a common security hole — and you may be paying for their licenses).
Make sure each active person has the right license — no overpaying, no one sharing logins.
Confirm there’s more than one admin so you’re never locked out, but not *too* many.

2. Email and mailboxes

Convert ex-employee mailboxes to shared mailboxes so you keep the history without paying for a license.
Set up or clean up shared mailboxes (info@, billing@, support@) so the right people get the right mail.
Check forwarding rules — sneaky auto-forwards are a classic sign of a compromised account.

3. Security basics (the high-impact stuff)

Turn on multi-factor authentication (MFA) for everyone. This single step blocks the large majority of account takeovers.
Review admin accounts and recent sign-in activity for anything from unexpected locations.
Make sure email security (anti-phishing/spam) is actually on and tuned.

4. Devices and access

Know which devices are connected to company email and accounts.
Set a clean onboarding/offboarding routine so adding or removing a person takes minutes, not guesswork.

5. Backups and continuity

Microsoft does not fully back up your data the way people assume. Confirm you have a real backup of email and files.
Document where critical accounts and recovery info live (securely).

Do it once, then keep it simple

A one-time cleanup fixes the risky stuff. After that, a quick quarterly check keeps it tidy — no bloated managed-IT contract required.

Lightweb Networks does right-sized IT for South Denver small businesses (roughly 1–15 people): Microsoft 365 cleanup, email security, devices, Wi-Fi, and printers — in plain English, without pushing a huge contract.

Want a baseline review of your Microsoft 365 setup? Book a free call or call (720) 647-5669.