Over 3.9 million verified businesses globally rely on Microsoft 365, according to Landbase. Yet, most businesses are still missing out on powerful features included in their Microsoft 365 subscriptions and paying extra for third-party solutions.

Why does it happen? When employees can’t find the right resources within their existing platforms, they don’t wait for procurement. Instead, they turn to familiar third-party tools. Such behaviour creates a widespread financial issue, leading to a proliferation of overlapping subscriptions and additional invoices for applications that essentially duplicate Microsoft’s offerings.

Our practical guide helps businesses to identify these overlaps, tackle them head-on, and recover the wasted expenditures through the structured approach of a Secure Microsoft 365 Assessment.

The Adoption Gap. Why Paying for Microsoft 365 Isn’t the Same as Using It

Microsoft 365 is one of the most feature-rich platforms available. This comprehensive suite offers a wide range of tools for various needs, from communication, collaboration, and project management to file storage, business intelligence, compliance, and security.

Nevertheless, CoreView research shows that businesses are using only a fraction of what they have paid for, leaving 56% of Microsoft 365 licences inactive, underutilised, oversized, or unassigned. The reasons for this gap stem mainly from structural issues often caused by:

  • Rushed migrations. Businesses often migrate to Microsoft 365 fast, without taking the time to prepare their workforce for the transition.
  • Minimal training. Without proper guidance, employees may overlook the full spectrum of Microsoft 365’s capabilities. As a result, they may use applications sporadically and not take full advantage of all features available.
  • Default configurations. Default settings may keep things familiar, but they can also limit potential. You might overlook powerful features that could transform your operations and benefit users.

For instance, while Microsoft Planner includes advanced project management features, employees lacking proper training may still assign tasks via email. Likewise, business intelligence teams unaware of Power BI’s capabilities might continue to rely on static spreadsheets, missing out on real-time data-driven insights.

In summary, your employees aren’t intentionally ignoring Microsoft 365. They simply may not have received the necessary support and training to make the most of it. This is a change management issue, not a user failure.

And when adoption stalls, businesses find themselves paying for external solutions, drifting into a cycle of increasing unnecessary costs. As a result, low engagement can become an active cost generator.

Shadow IT Isn’t Just a Technology Problem, It’s a Spend Issue

Microsoft Shadow IT Guidance reports that the average business has over 1,000 unsanctioned or unmanaged cloud applications (i.e., shadow IT) that employees use without management’s knowledge. This shadow IT is the direct consequence of staff experiencing a capability gap.

Once again, when official tools such as Microsoft 365 fall short, because they are too slow, too complicated, or just unfamiliar, employees seek out alternative solutions, generating shadow IT costs that quietly drain your budget.

5 Areas of Overlapping Software Costs that Might Be Eating Away Your Finances

70% of IT leaders surveyed by Flexera in 2026 believe business units buy more cloud and SaaS applications than they are aware of. Here are five common areas where overlapping software creates hidden expenses:

  1. Project management. A team struggling with project management or task allocation may opt for tools like Trello or Asana over Microsoft Planner or Project.
  2. Video conferencing. Employees might subscribe to Zoom or WebEx, unaware that Microsoft Teams offers the same functionalities.
  3. File sharing. Entire departments might choose the more familiar Dropbox or Google Drive for securely sharing presentations and reports rather than OneDrive and SharePoint.
  4. E-signature tools. HR and finance staff might lean towards well-known e-signature solutions like DocuSign without realising they can access integrated features through Adobe and Microsoft.
  5. Business intelligence platforms. Untrained BI employees might turn to Tableau or Looker even though Power BI offers similar functionalities.

The Financial Consequences of Shadow IT: Are You Overpaying Without Knowing It?

The cumulative costs of these overlapping subscriptions can be substantial, even for smaller teams. Your business ends up paying monthly or annual fees to third-party vendors for capabilities you have already invested in.

Additionally, such redundant costs are often invisible to finance teams, as they are dispersed across individual and departmental budgets, expense claims, and ad hoc procurement decisions.

Shadow IT Inflates Your Budget While Bypassing Security

The issue of shadow IT extends beyond financial implications. It significantly amplifies security risks within your business. Unsanctioned tools lead to unmanaged data environments that can easily jeopardise sensitive information. This can put your business at risk of data breaches, damaged reputation, loss of customer trust, and costly compliance issues.

How You Fund Your Own Vulnerabilities Through Unsanctioned Tools

Netskope 2026 Cloud and Threat Report points out that 60% of insider threat incidents involve the upload of sensitive data, intellectual property, source code, and credentials to unapproved apps. This finding underscores how widespread unregulated access inadvertently exposes businesses to data governance, security, and compliance issues that can potentially lead to substantial financial repercussions.

The recent Instructure/Canva cyber security incident is a perfect example. The breach affected 275 million users across nearly 9,000 educational institutions using the platform. The attack cost Canva millions of dollars in remediation, legal fees, reputation damage, and lost business.

Ultimately, every unsanctioned tool creates a hole in your business’s data governance perimeter. So, when you fail to drive adoption of Microsoft 365-controlled tools, you are essentially funding your own vulnerabilities.

For example:

  • Third-party file sharing. When your employees use services like Dropbox or WeTransfer, your business and customers’ data is stored outside your Microsoft 365 governance framework. This can lead to data breaches and loss of sensitive information.
  • Unregulated messaging platforms. If a team uses a messaging solution like Slack without proper configuration for data retention and compliance, confidential conversations may occur in an environment you cannot oversee. Consequently, your team could inadvertently violate legal and regulatory requirements without you even noticing it.
  • Project management tools. Sensitive data, such as client-facing information and confidential strategies stored in third-party tools, is subject to that vendor’s security standards. However, such standards might be less stringent than your own, increasing the potential of security risks.

That’s why shadow IT isn’t merely a security compliance issue managed by IT departments. It’s an exposure at the board level that combines unnecessary spending with risks to your business’s data integrity.

Mapping the Overlap: What a Software Licence Audit Actually Reveals

A comprehensive Microsoft 365 licence optimisation audit helps you uncover critical gaps and opportunities that many businesses may overlook, such as:

  1. Unused licence tiers. Businesses frequently purchase higher-tier licences packed with advanced features that often remain unconfigured and unused. For instance, if you have invested in Microsoft 365 Business Premium but have not configured Intune device management, compliance tools, or advanced threat protection, you are paying for services you aren’t using. Furthermore, you are missing out on centralised endpoint management and undermining your business-wide security protocols.
  2. Direct subscription duplication. When your teams set up meetings on Zoom, analyse data with a different analytics tool, or manage documents in an external system instead of leveraging Teams, Power BI, or SharePoint, they contribute to increasing cost. Furthermore, they are unknowingly adding unnecessary complexity and potential security gaps.
  3. Shadow spend. Software subscriptions acquired outside the official procurement process create hidden and untracked expenses. Imagine your marketing manager using his personal credit card to subscribe to a social media analytics tool without going through the official channels. Such hidden costs can accumulate fast, and without formal audits, they usually remain invisible.

To Recover Your Investment, You Need More Than a Spreadsheet Exercise

Most businesses that have never conducted a structured Microsoft 365 licence audit will find they spend more on technology than anticipated and are underutilising their Microsoft 365 investment.

But identifying and addressing these gaps to recover the value of your investment requires a deliberate process that includes a clear Microsoft licence optimisation strategy. Pairing it with the right cloud infrastructure platform will empower you to streamline operations and ensure that the recovered expenses truly align with your business’s needs.

The Secure 365 Assessment. From Financial Audit to Strategic Clarity

Successfully transitioning from familiar third-party tools to Microsoft-native options involves more than just making commercial decisions. It also requires considering the investment necessary for effective adoption.

Enter the Secure 365 Assessment. A process that transforms an abstract understanding of technology spending into a clear, actionable plan that promises quantifiable returns, making it a crucial investment for any business looking to gain control over its tech environment.

The tool offers a systematic approach to consolidating financial resources associated with Microsoft 365 use. It achieves three critical goals that internal reviews typically miss and empowers leadership to make informed decisions:

Goal #1. Delivering a comprehensive asset mapping. The Secure 365 Assessment provides you with a detailed inventory of your Microsoft 365 setup. This includes licensed features, configurations, and active usage rates. For instance, a healthcare provider may discover they own licences for Azure Information Protection but have never configured it. Microsoft 365 Assessment’s factual overview enables leadership to base licensing decisions on real data rather than estimates, ensuring that resources are used effectively.

Goal #2. Clarifying external SaaS expenses. The assessment actively maps external SaaS tool spending that duplicates Microsoft 365’s native capabilities. For example, a business using a standalone CRM alongside Microsoft Dynamics may discover they are spending thousands of pounds unnecessarily every year. By identifying overlapping subscriptions, the assessment quantifies potential savings and highlights which tools can be discontinued.

Goal #3. Unveiling risk management insights. The process highlights unmanaged tools exposing the business to potential risks and translates these technical vulnerabilities into terms that resonate at the board level. For instance, if a marketing team uses unapproved tools for sensitive customer data analytics, you can present the resulting data protection risks to executives for action.

The output is a prioritised set of actionable recommendations that specify which subscriptions to cancel, which features to activate, and which security configurations to address.

The ROI Has Always Been There. Learn How to Calculate It Correctly

For business leaders who have invested heavily in Microsoft 365, demonstrating a clear return on investment (ROI) can be challenging. Many view such ROI solely as the balance between licence costs and productivity gains.

However, if you calculate Microsoft 365 ROI by considering only the enhancements and tools added to your workflow, you miss a key aspect: the external spend that you can eliminate by removing third-party tools and replacing them with Microsoft 365’s native capabilities.

Therefore, to get a more accurate measure of your ROI, widen your perspective and ensure to include in your calculations:

  • Cancelled redundant subscriptions. Eliminating multiple SaaS subscriptions leads to direct savings. For instance, if a company cancels three separate project management tools costing a total of £30,000 annually, those savings become a tangible return on the Microsoft 365 investment.
  • Decommissioned third-party solutions. Require your security team to replace a third-party endpoint management system with Intune. The cost reduction from discontinuing that tool is clearly measurable and will directly contribute to the overall ROI.

The Impact of Microsoft 365 Features Adoption on ROI

In addition to substantial cost savings, higher adoption rates of Microsoft 365 tools enhance productivity.

As your workforce increasingly uses Microsoft 365’s features, opting for Teams for meetings, SharePoint for document management, and Power Automate for workflow optimisation, your potential ROI evolves.

That’s why Microsoft 365’s ROI isn’t a static figure established at the time of licence purchase. It’s a dynamic amount that changes as adoption improves and unnecessary expenditure is eliminated.

The Secure 365 Assessment can help you understand your current position on this ROI curve and identify opportunities for significant financial and operational improvements.

Conclusion

Most businesses unknowingly pay twice for technology. First, they buy Microsoft 365 licenses, then they pay for extra, redundant third-party services.

This issue extends beyond the technology team; it requires leadership involvement and a systematic, business-wide approach. Acora’s Secure 365 Assessment Service is a starting point. It helps you understand the technology you already have and pinpoint hidden costs.

By gaining a deeper understanding of your Microsoft 365 investment, you will be able to implement targeted, measurable actions that unlock value, enhance operational efficiency, and reduce risks.

The potential savings from your Microsoft 365 investment are still there; you just need to find and use them. Talk to our Microsoft Experts now.