Mergers and acquisitions are accelerating, with global deal volume jumping 12.6% in early 2025.1 As companies look to expand markets, streamline operations, and maintain a strategic advantage, IT teams are expected to keep everything running during the transition.
Easier Said Than Done
Despite the high hopes behind most M&A deals, one factor repeatedly derails them: post-merger IT integration. In fact, an alarming 70% of M&A failures are tied to poor IT integration planning.2
On paper, a merger can make a lot of sense. But in practice, bringing systems, data, and users across disparate platforms together into one cohesive ecosystem is one of the most important – and underestimated – parts of any merger. If not handled right, it creates a damaging ripple effect that’s hard to contain and come back from.
Here are some of the most common breakdowns:
- Conflicting tools and access issues: Teams may be stuck toggling between duplicate systems – or worse, locked out of the tools they need – creating a maddening user experience that slows productivity.
- Security gaps or compliance blind spots: During a rushed transition, details like identity controls, MFA, and data retention policies often slip through the cracks, which not only exposes sensitive information, but can also trigger compliance violations.
- Confused users and frustrated teams: If users don’t know which credentials to use, where to store files, or how to access their tools, they spin their wheels just trying to get their bearings at a time when roles are shifting, resources are stretched thin, and everyone’s under pressure to perform.
- Delays that eat into ROI: Every day spent untangling access issues or fixing broken workflows pushes back the timeline for seeing value from the merger. What should be a strategic win turns into a frustrating time suck and costly distraction.
- A flood of tickets the help desk can’t keep up with: When access isn’t staged properly or users are caught off guard by changes, support teams get slammed with issues that could’ve been avoided. Instead of focusing on strategic tasks, IT ends up in constant firefighting mode.
A Checklist for Seamless IT Integration
Whether your business is months away from the transition or already knee-deep in the details, here are some strategies to keep the integration on track:
- Conduct a thorough IT audit: Before the merger even closes, assess all existing systems, identify tech debt, and spot potential compatibility issues. This lays a solid foundation and helps avoid surprises down the road.
- Use a phased approach: Break the integration into manageable chunks that tackle the most urgent needs first. This helps maintain continuity and keeps user disruption at bay.
- Pilot test with real users: Run proof-of-concept migrations with actual employees. This real-world testing helps identify friction points and refine processes before a full rollout.
- Communicate, communicate, communicate: Keep all stakeholders in the loop with straightforward, jargon-free communication about what’s happening, when, and why. When it comes time for roll-out, make sure users have all the info and tools they need to hit the ground running in the new system. Offer a clear line of communication to IT support for any questions, issues, or escalations.
- Work with the tools you already have: Make the most of the platforms and solutions at your disposal. Using familiar systems effectively can streamline transitions, reduce the learning curve for users, and maintain productivity throughout the integration.
Real-World Example: How One Merger Got IT Right
In a recent case study, a life sciences company successfully completed a complex merger of two Microsoft 365 environments in under 90 days – with zero downtime. The company partnered with the musa team, who brought strategic foresight, hands-on execution, and an innovative methodology. By applying a phased approach and using Microsoft tools like Entra ID, OneDrive, Exchange Online, and BitTitan, musa helped the client enjoy a streamlined and secure transition that was seamless to end users.
If You’re on Microsoft, You’re Already on Solid Footing for a Smoother Transition
The right tools won’t replace smart planning, but they will make the process a whole lot smoother. Microsoft’s cloud ecosystem is purpose-built to handle staged migrations, identity management, and secure collaboration without the chaos of confusing workarounds.
musa can help you plan, stage, and execute complex integrations using the Microsoft ecosystem of tools to reduce friction, avoid disruption, and keep the transition on track.
