Microsoft 365 can be one of the most useful platforms in your business. It gives your team email, file storage, collaboration, video meetings, shared documents, security tools and cloud access in one place. But when it grows without structure, it can quickly become messy.
This is known as Microsoft 365 sprawl. It happens when Teams, SharePoint sites, OneDrive folders, user accounts, licences, permissions and third-party apps build up over time without clear ownership or governance.
For many London businesses, sprawl does not happen because anyone has done something wrong. It happens because people are trying to get work done quickly. A new Team is created for a project. A SharePoint site is set up for a department. A file is shared externally. A licence is assigned and never reviewed again.
Over time, this creates confusion, wasted spend and security gaps. Northern Star IT consultancy can help you bring Microsoft 365 back under control, so your team can work more securely and efficiently.
The risk is real. The UK Government’s Cyber Security Breaches Survey 2025/2026 found that 43% of UK businesses identified a cyber breach or attack in the previous 12 months, while phishing remained the most common type of attack, affecting 38% of businesses.
What does Microsoft 365 sprawl look like?
Microsoft 365 sprawl is not always obvious at first. Your systems may still work. Your staff may still send emails, join meetings and access files. The problem is that everything becomes harder to manage behind the scenes.
Common signs include:
- Too many Teams channels with unclear ownership
- SharePoint sites that nobody actively manages
- Files stored in both OneDrive and SharePoint with no clear rules
- External users who still have access after a project ends
- Unused licences that continue to cost money each month
- Old staff accounts that have not been properly removed
- Duplicate folders, duplicate documents and conflicting versions
- Apps connected to Microsoft 365 without proper review
At first, these issues may seem like small admin problems. In reality, they affect security, productivity and cost control.
How sprawl creates security problems
Microsoft 365 holds some of your most important business data. That may include client records, contracts, payroll information, financial files, HR documents, proposals and internal strategy documents.
If permissions are not managed properly, people may have access to information they should not see. Former employees, external contractors or old guest users may still be connected to files or Teams channels. In some cases, sensitive data may be shared more widely than intended.
Sprawl also makes it harder to apply consistent security controls. Microsoft recommends key protections for Microsoft 365 for business, including multi-factor authentication, protected admin accounts, preset security policies and, where needed, Conditional Access.
These controls are much easier to manage when your Microsoft 365 environment is tidy. If accounts, groups, sites and permissions are disorganised, it becomes harder to know whether the right protections are in place.
Why external sharing needs careful control
External sharing is useful. Your business may need to share files with clients, suppliers, consultants or partners. But without clear rules, external sharing can become a serious weak point.
A document shared for one short project may remain accessible long after the work has finished. A guest user may keep access to a Team they no longer need. A link may be forwarded to someone who was never meant to receive it.
This is especially risky if your business handles confidential client data or commercially sensitive information. You need to know who has access, why they have access and when that access should end.
Microsoft 365 can support secure collaboration, but only when sharing settings, permissions and review processes are properly managed.
How sprawl damages productivity
Microsoft 365 sprawl does not only create cybersecurity risk. It also slows people down.
When staff do not know where files belong, they waste time searching. When documents are duplicated, people may work on the wrong version. When Teams channels are cluttered, important messages get missed. When permissions are inconsistent, employees may be blocked from files they genuinely need.
This creates frustration across the business. Staff may start saving documents locally, using personal storage or creating their own workarounds. That makes the problem worse, because data becomes even harder to manage.
Productivity loss is often hidden. If 10 members of staff each lose just 15 minutes a day searching for files or dealing with access issues, that adds up to more than 12 hours a week. In a London business, that can quickly represent £100s or even £1,000s of lost time each month.
How licence sprawl wastes money
Microsoft 365 licence costs can creep up quietly.
As your business grows, users are added. Some leave. Some move roles. Some need advanced features for a short period and then no longer use them. Without regular review, you may keep paying for licences that are unused, oversized or no longer suitable.
Licence sprawl can include:
- Paying for inactive users
- Assigning premium licences where standard licences would be enough
- Keeping old mailboxes active unnecessarily
- Using separate tools when Microsoft 365 already includes a suitable feature
- Failing to review subscriptions before renewal
A licence review will not always mean reducing spend. Sometimes you may need better tools or stronger security features. But it does help you understand whether your money is being spent in the right place.
Why admin accounts need special attention
Admin accounts are powerful. If an attacker gains access to one, they may be able to change settings, access data, create accounts or weaken security controls.
That is why admin accounts should be limited, protected and reviewed regularly. Microsoft’s guidance includes protecting admin accounts and using multi-factor authentication as part of its Microsoft 365 security best practice recommendations.
In a sprawling Microsoft 365 setup, admin access can become unclear. Too many people may have elevated permissions. Old admin roles may remain in place. Some accounts may not have the right security controls.
A strategic review can help you apply the principle of least privilege. This means users only have the access they genuinely need to do their work.
How to bring Microsoft 365 sprawl under control
The answer is not to lock everything down so tightly that nobody can work. The aim is to create a clear, secure and practical structure.
A sensible Microsoft 365 review should look at:
- User accounts and inactive users
- Microsoft Teams structure and ownership
- SharePoint sites, permissions and file organisation
- OneDrive usage and personal file storage habits
- Guest access and external sharing
- Licence usage and subscription costs
- Admin roles and privileged accounts
- Security settings, MFA and Conditional Access
- Backup, retention and recovery requirements
Once you understand the current position, you can prioritise improvements. Some issues may be quick wins, such as removing inactive users or reviewing guest access. Others may need a more structured project, such as redesigning SharePoint or improving Teams governance.
Why governance matters
Governance sounds formal, but it simply means having clear rules for how Microsoft 365 should be used.
Your business should know who can create Teams, how SharePoint sites are named, when external sharing is allowed, who reviews permissions, how long data is retained and what happens when staff leave.
Without these rules, sprawl returns. With them, Microsoft 365 becomes easier to manage and safer to use.
Good governance also supports compliance and client confidence. If a client asks how their data is protected, you can give a clearer answer. If cyber insurance asks about access controls, backups or security policies, you are better prepared.
Make Microsoft 365 work properly for your business
Microsoft 365 should help your business work faster, collaborate securely and manage information with confidence. If it has become cluttered, confusing or difficult to control, it may be time for a proper review.
Northern Star can help you assess your Microsoft 365 environment, reduce unnecessary sprawl, improve permissions, review licences and strengthen your security settings. You get practical advice, not unnecessary jargon.
Contact Northern Star today to discuss your Microsoft 365 setup and build a cleaner, safer and more productive way of working.
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