Securing Microsoft 365 Without Slowing Your Team Down

Microsoft 365 works the day you buy it, but that doesn’t mean it’s set up properly. Microsoft can’t know how your business runs, so a lot of the settings that keep it secure are left at the default, waiting for someone to make a decision.

Once they’re in place, most of these are invisible to your team. Here are the ones worth changing.

Multi-factor authentication, with number matching

Turn on multi-factor authentication for everyone, and switch on number matching so a login request can’t be approved by accident. Your team will notice it when they use a new device, and then forget about it.

Block old sign-in methods

Some older email connections were built before multi-factor authentication existed and can’t use it, which gives attackers a way around everything else you’ve set up. Blocking them is usually simple. The exception is an old copier, scanner, or business program that still sends email the old way. Fix that first, then switch the old methods off.

 Extra checks for unfamiliar logins

A company laptop in your Bastrop office is a verydifferent risk from an unknown device signing in from another continent at 3 a.m. Microsoft 365 can treat them differently.

Two rules do most of the work: ask for multi-factor authentication when someone signs in from outside your usual locations, and block or challenge logins from countries where you don’t do business. This also cuts down on prompts for people working normally, so security doesn’t turn into a daily annoyance.

Protect your admin accounts

Keep the number of admin accounts small, give admins a separate account for admin work, and protect those accounts with the strongest method you have, ideally a physical security key. An admin account that’s also used for everyday email is a big target doing a small job.

A warning on outside emails

A visible banner on emails from outside your company gives people a moment to pause before acting on a message that claims to come from a coworker. It’s a small change that pays off, especially against the short, urgent email that looks like it came from the owner.

Sensible file sharing settings

The default sharing settings in SharePoint and OneDrive are often more open than businesses realize. Decide whether shared links should work for anyone or only people in your company, decide whether outside links should expire, and check what’s already being shared widely. Teams that moved over in a hurry usually find something.

Alerts on email forwarding

One of the first things an attacker does after breaking into a mailbox is set up a rule that quietly copies emails somewhere else. An alert whenever a new forwarding rule appears is one of the most useful notifications in Microsoft 365, and it’s often switched off by default.

Back up your Microsoft 365 data

This one surprises people. Microsoft keeps the service running and protects its own systems, but it isn’t keeping a long-term backup of your email, files, and Teams content for you. Its retention limits are also shorter than most businesses think. If a folder is deleted in March and nobody notices until August, Microsoft’s built-in recovery may not help. A separate backup closes that gap.

Why it’s done this way

Security that gets in the way gets worked around, and a workaround is often worse than what it replaced. Every setting above either runs in the background or takes a few seconds on a new device, so your team can keep working the way they already do.

Want to know where you stand?

We can check which of these eight are already turned on in your Microsoft 365. CMIT Solutions of Austin East supports businesses across East Austin, Bastrop, Del Valle, Dale, Cedar Creek, Lockhart, and Red Rock, with predictable monthly pricing and no long-term contracts.