For a five-person business, the Microsoft 365 setup that lasts rests on three pillars: the right plan (usually Business Standard or Business Premium), a security baseline switched on from day one (two-factor authentication for everyone), and a clear organisation of files and email. Budget around 12 to 22 € per user per month depending on the plan. Here's how to build a clean foundation that saves you trouble for years.
Which plan to choose for five people
Two plans cover almost every small Paris business:
- Business Standard: the installed Office apps, Outlook, Teams, SharePoint and OneDrive. Enough for a team that wants to work cleanly and share its files.
- Business Premium: everything in Standard, plus the security and device-management tools. It's the recommended choice as soon as you handle sensitive client data or people work on their own hardware.
For five people, the price difference stays modest against the peace of mind it brings. A law, consulting or healthcare practice in the 16th has every reason to go straight for Premium.
Security first: two-factor authentication for everyone
This is the most important and most neglected measure. Turn on two-factor authentication (MFA) for every account, no exceptions, including your own. A password stolen by phishing is then no longer enough to get into your mailbox. The vast majority of small-business hacks go through an email account without MFA. Add a strong-password policy and sign-in logging. These settings take an hour to put in place and radically change your exposure to risk.
Organising files: SharePoint instead of attachments
The classic mistake in small teams: emailing files back and forth and ending up with fifteen versions of the same document. The right foundation is SharePoint for the company's shared files and OneDrive for each person's own files. Create a few clear libraries by theme (clients, admin, sales), with access rights thought through. Everyone works on the same version, at the same time if needed, and nothing is lost when someone goes on holiday or leaves the company.
Professional email and your domain name
A credible business uses addresses on its own domain name, not free generic ones. Microsoft 365 runs your email on your domain, with the technical records that make sure your emails arrive and aren't spoofed. This part deserves to be done properly: a badly configured domain, and your quotes land in your clients' spam folder. It's a point where support from small business IT support in Paris saves precious time and avoids the mistakes that cost dearly.
Teams and day-to-day collaboration
For five people, Teams replaces internal messaging, video calls and in-meeting file sharing all at once. Keep it simple: one general team, a few channels per project or client, and link the files to SharePoint. Avoid piling up channels from the start, add them as needs arise. A small team well organised on Teams spends far less time in internal email. Set a couple of simple habits early: keep decisions in the relevant channel rather than in private chats, and pin the important documents so nobody hunts for them later. Those small rules cost nothing to adopt and keep the whole team on the same page as the workload grows.
Backup: Microsoft 365 doesn't back everything up for you
This is a common and dangerous misunderstanding. Microsoft guarantees the service is available, but if a colleague deletes files or an account is compromised, recovery beyond the recycle bin isn't guaranteed for long. A third-party backup of your Microsoft 365 data (email, SharePoint, OneDrive) is strongly recommended for a business. It's cheap and it protects you from human error or a ransomware attack.
Handling leavers and joiners
In a small business, people come and go. A setup that lasts plans for it: when someone leaves, you block their account, recover their email and files, and reassign their licence. Nothing is lost, no access stays open. Documenting this simple procedure avoids the classic security gaps, like a former employee keeping mailbox access six months after leaving. The same goes for joiners: a ready checklist means a new hire gets a mailbox, the right file access and the shared apps on their first morning, instead of chasing permissions for a week. Written down once, this routine takes minutes each time and keeps the whole account tidy as the team grows.
A foundation that endures
Set up well, this configuration lasts for years without a second thought: the right plan, MFA everywhere, files in SharePoint, email on your domain, third-party backup and clear leaver procedures. It's exactly what we put in place for small Paris businesses, and what saves them from disasters. If you're also launching your online presence, think about website design in Paris at the same time.
Want to launch or rebuild Microsoft 365 for your team without losing days over it? Call or message me at 07 66 84 52 57, by phone or WhatsApp. I work with small businesses across Paris and the near suburbs, with a clean, secure foundation and hands-on onboarding for your team.