Client Challenge
A professional services firm handling confidential client information was frustrated with slow response times, recurring issues that were never fully resolved, and unclear billing from their previous MSP. Leadership had no confidence that their Microsoft 365 environment was secure, and no one could confirm whether MFA was enforced or whether backups existed.
Environment
Microsoft 365 for email, files, and collaboration, with a small on-premise presence for a line-of-business application. The previous MSP retained administrative access with no documented handoff. Several mail forwarding rules and third-party application permissions existed with no clear business justification.
Risk
Unreviewed administrative access by a former provider, unexplained mail forwarding rules, and unverified application permissions created real exposure to business email compromise and data exfiltration. The lack of confirmed backup or MFA meant a single compromised account could cause significant damage.
Titan's Approach
- Coordinated a structured transition from the previous MSP, including revoking stale administrative access.
- Conducted a Microsoft 365 security review covering admin roles, mail forwarding rules, and OAuth application consent.
- Enforced MFA and conditional access across all accounts.
- Reviewed and removed unnecessary third-party application permissions.
- Implemented Microsoft 365 backup with monitoring and tested recovery.
- Deployed endpoint protection, email security filtering, and DNS-based web protection.
- Established proactive monitoring, documentation, and a clear help desk communication path.
Technology Improvements
- Full environment documentation so issues can be diagnosed without guesswork.
- Clean, justified Microsoft 365 configuration with reviewed permissions and integrations.
- A responsive support model replacing the previous unresponsive ticket queue.
Security Improvements
- Revoked stale administrative access from the prior provider.
- MFA and conditional access enforced across every account.
- Mail forwarding rules and OAuth permissions reviewed and cleaned up.
- Microsoft 365 backup, endpoint protection, and email filtering deployed.
Business Outcome
The firm moved from an unresponsive, unclear support relationship to proactive management with documented security. Leadership now has confidence that Microsoft 365 is secured, backups are tested, and issues are resolved quickly. Recurring problems dropped significantly, and the firm has a clear technology roadmap instead of constant surprises.
Lessons Learned
- During any MSP transition, reviewing administrative access and application permissions is critical.
- Mail forwarding rules and OAuth consent are common, easily overlooked vectors for data exfiltration.
- Clear documentation and communication are as important as the technical controls themselves.
- A proactive model with monitoring prevents the recurring issues that define a bad MSP experience.
This case study is anonymized to protect client confidentiality. Details have been generalized while accurately reflecting the nature of the engagement, the risks involved, and the outcomes achieved.