Microsoft Project Online reaches end of life on September 30, 2026. For organizations still using the platform, the deadline is fixed but the migration strategy doesn’t have to be.
One of the biggest misconceptions about Project Online migration is that everything has to be completed before September 30. Organizations often assume they need to redesign processes, rebuild reports, configure integrations, migrate years of historical data, and train every user before they can move to a new platform.
That approach can introduce unnecessary complexity and risk.
At OnePlan, we’ve found that the most successful migrations focus first on maintaining business continuity. Once the organization is running successfully on its new platform, additional capabilities can be introduced in planned phases. Rather than treating migration as one large project, we separate the work into manageable stages that reduce risk while still meeting Microsoft’s retirement deadline.
Start with Business Continuity
The first objective of any Project Online migration is simple: ensure the organization can continue planning, delivering, and reporting on work after September 30.
That means establishing the OnePlan environment, migrating the data needed for production, validating the solution, and completing the cutover before Project Online retires. Once teams are working successfully in OnePlan, organizations can continue expanding their environment with additional reporting, workflow automation, integrations, and process improvements.
Breaking the migration into phases allows organizations to move forward with confidence instead of delaying the entire project until every enhancement is complete.
Not Every Organization Needs the Same Migration Approach
Some organizations have already selected a replacement platform and are ready to begin implementation. Others are still evaluating options, working through procurement, or starting later than planned. Some require a complete migration of project schedules, while others simply need to preserve portfolio visibility before Microsoft’s deadline.
That’s why OnePlan offers five migration approaches based primarily on implementation timeline. The goal is the same in every case: successfully transition away from Project Online before September 30 while choosing an approach that fits the organization’s timeframe and priorities.
Migration Path | Timeline | Best Fit |
Standard | 8–10 weeks | Complete migration with full validation, testing, and user training |
Compressed | Up to 8 weeks | Full migration on an accelerated implementation schedule |
Accelerated | Up to 6 weeks | Production migration within a condensed timeline |
Fast-Track | Up to 4 weeks | Portfolio migration with active schedules managed through the OnePlan Project Connector |
Rapid | Approximately 1 week | Streamlined migration for organizations approaching the retirement deadline |
Earlier implementations allow for broader optimization before go-live. Later implementations prioritize production readiness first, with additional enhancements delivered afterward.
Reduce Risk by Phasing the Work
Organizations that begin earlier have more flexibility. There is time to migrate project schedules, complete user acceptance testing, refine reports, train users, and introduce new processes before launch.
As the retirement date gets closer, priorities naturally shift.
Instead of delaying the migration while every enhancement is completed, the focus becomes preserving operational continuity. Portfolio structures, project information, and resources are migrated into OnePlan, while active Microsoft Project schedules continue through the OnePlan Project Connector. This allows project teams to keep work moving while the organization continues modernizing after go-live.
By separating migration from optimization, organizations reduce implementation risk without sacrificing long-term goals.
Every Migration Starts with an Assessment
Before recommending an implementation approach, OnePlan works with each customer to understand their existing Project Online environment.
The assessment reviews the current configuration, data volume, customizations, integrations, and overall complexity. From there, OnePlan recommends the migration path that best fits the organization’s timeline and requirements. Engagements are delivered through OnePlan Professional Services or one of our qualified Premium Partners.
Starting with an assessment provides a realistic implementation plan while helping organizations avoid unnecessary delays.
A Migration That Continues to Deliver Value
Moving away from Project Online is the beginning of a more modern and connected planning environment.
Once production migration is complete, organizations can continue expanding their OnePlan deployment with strategic portfolio management, resource planning, financial planning, reporting, AI-powered insights, and integrations with Microsoft, Jira, and other enterprise tools.
The earlier a migration begins, the more flexibility there is before September 30. But even organizations starting later still have practical options.
The key is focusing first on a successful production migration.
