Professional Services Firm Achieves 99.9% Uptime After Cloud Migration

Challenge

The firm had operated on the same basic IT infrastructure for over a decade. A pair of aging servers in a closet-sized server room handled email, file storage, and the firm’s practice management system. A single ISP connection served the entire office. Backups ran to tape drives that were swapped weekly by an office administrator who had inherited the task with no formal training.

For years, this setup had been adequate — not ideal, but functional. Then the demands changed. The firm’s partners wanted to attract younger talent who expected remote work flexibility. Clients increasingly expected faster turnaround and real-time collaboration on documents. And the infrastructure itself was showing its age: the firm experienced four significant outages in the previous 12 months, including one during tax season that took email offline for 18 hours and another during a critical litigation deadline that made case files inaccessible for an entire afternoon.

The partners recognized they needed to modernize, but they had serious concerns. The firm handled sensitive client data — financial records, legal documents, tax returns — that was subject to strict confidentiality obligations. They couldn’t afford an extended migration period that would disrupt client work. And their previous experience with an IT vendor who had proposed a migration three years earlier had left them skeptical: that vendor’s proposal had been a thinly disguised sales pitch for their own managed services platform, with a price tag that would have doubled the firm’s IT costs.

The managing partner wanted a different approach — an independent advisor with no products to sell who could design the right solution for the firm’s specific needs.

Solution

SBK began with a thorough assessment of the firm’s current infrastructure, workflows, and requirements. The team spent two weeks understanding not just the technology, but how attorneys, accountants, and support staff actually worked day-to-day. This wasn’t about imposing a standard cloud template — it was about designing a cloud transformation that fit the firm’s specific operational patterns.

The assessment revealed that the firm’s infrastructure challenges were interconnected. The aging servers created reliability problems. The lack of remote access created productivity problems. The single-point-of-failure network design created resilience problems. And the manual backup process created data protection problems. A piecemeal approach — fixing one issue at a time — would waste money and extend the disruption. The firm needed a comprehensive migration, executed surgically.

SBK designed a phased migration plan built around one non-negotiable constraint: zero downtime during business hours. The migration would move the firm’s core systems — email, file storage, practice management, and document management — to Microsoft 365 and Azure, with each phase executed over weekends and validated before the next Monday morning.

Phase 1: Identity and Email. SBK migrated the firm’s email to Microsoft 365 with Exchange Online, implementing modern authentication and multi-factor access. Email history was migrated in the background over two weeks, with the final cutover executed on a Saturday. Staff arrived Monday morning to find their email working exactly as before — just faster, accessible from any device, and backed by Microsoft’s enterprise-grade infrastructure.

Phase 2: File Storage and Collaboration. The firm’s file server — containing over 3 terabytes of client documents accumulated over 15 years — was migrated to SharePoint Online and OneDrive. SBK implemented a folder structure that mirrored the firm’s existing organization, ensuring no one had to learn a new filing system. Permissions were mapped to match existing access controls, with the addition of sensitivity labels for documents containing personally identifiable information.

Phase 3: Practice Management and Line-of-Business Applications. The firm’s practice management system was migrated to an Azure-hosted environment with SBK’s managed IT team handling the configuration, testing, and validation. Database performance was benchmarked before and after migration to ensure no degradation.

Phase 4: Security and Compliance Hardening. With all systems in the cloud, SBK implemented a zero-trust security framework. This included conditional access policies, device compliance requirements, data loss prevention rules, and advanced threat protection. Every component was configured to meet the firm’s professional liability and client confidentiality obligations.

Throughout the migration, SBK conducted hands-on training sessions for every staff member, tailored to their role. Attorneys received training focused on mobile document access and secure client collaboration. Administrative staff learned the new backup and file management workflows. Partners received an executive overview of the security controls protecting client data.

Results

The migration was completed across four consecutive weekends with zero downtime during business hours. No client deadlines were missed. No work was lost. Staff arrived each Monday to systems that worked as expected, with incremental improvements they noticed immediately — faster file access, email on their phones, the ability to pull up a document from home on a Sunday evening.

Infrastructure costs dropped 45% compared to the previous year. The firm eliminated the expense of on-premises server maintenance, hardware replacement cycles, tape backup supplies, and the portion of their office lease allocated to the server room. The monthly cost of Microsoft 365 and Azure was less than half of what the firm had been spending to maintain aging equipment that failed regularly.

System uptime reached 99.9% in the six months following migration, compared to the four significant outages the firm experienced in the prior year. The firm sailed through the following tax season and litigation cycle without a single infrastructure-related disruption — a first in recent memory.

100% of the workforce was enabled for remote work. Partners and associates could access every system, document, and application from any location on any approved device. The firm implemented a hybrid work policy that allowed staff to work from home two days per week, which the managing partner credited with improving both recruitment and retention of junior staff.

The zero-trust security framework gave the firm’s partners confidence that the move to cloud had actually strengthened their security posture rather than weakened it. Conditional access policies ensured that client data could only be accessed from compliant devices, and data loss prevention rules prevented accidental sharing of sensitive documents outside the organization.

SBK continues to provide managed IT support for the firm, monitoring the environment, managing updates, and serving as the firm’s outsourced IT department — a role that costs less per month than the firm previously spent on emergency break-fix calls alone.