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How to Fix Microsoft Project Desktop Tasks Not Syncing to Project Online

Kushani Nimanthika Oct 1, 2026 868 views

Question details

Users need to resolve an issue where tasks and assignments created in Microsoft Project Professional fail to appear in Project Online.

Fix Microsoft Project Desktop Tasks Not Syncing to Project Online

Product: Microsoft Project
Device & OS: not provided
Scenario: Publishing task updates and resource assignments from the Project Desktop application to Project Online.
Observed behavior: Tasks and assignments published from the desktop client do not show up in Project Online task views, typically due to configuration issues with permissions, resources, filters, or timesheets.

Before you start

Ensure you have administrative access to Project Web App (PWA) settings and that your Microsoft Project Desktop application has an active, authenticated connection to your Project Online environment.

Solution 1Recommended

Verify Permissions and Republish the Project

Check that all resources are properly mapped and have correct permissions before republishing the project data.

The most common reason tasks fail to sync is incorrect resource allocation or lack of user permissions. Project Online requires enterprise resources to be properly authenticated to view their assigned tasks.

Confirm enterprise resource assignments

Open your project in Microsoft Project Desktop and verify that all tasks are assigned to correct enterprise resources, rather than local resources.

Check user permissions

Ensure that each assigned user has the required permissions to access and view the specific project within Project Online.

Republish the project

Navigate to the 'File' tab in Microsoft Project Professional and select 'Publish' to push the latest task and assignment data to Project Online.

Clear Tasks view filters

Log into Project Online, navigate to the Tasks view, and clear any active filters that might be hiding the newly published assignments.

Verify Permissions and Republish the Project

Publishing Time: It may take a few minutes for the published changes to fully process and appear in the Project Online interface depending on server load.

Solution 2

Configure PWA Timesheets to Add Tasks

Manually pull existing task assignments into Project Online timesheets if they do not populate automatically.

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Frequently Asked Questions

Why are my resources not seeing their assignments in Project Online?

This usually occurs if local resources were used instead of enterprise resources, or if the users lack the necessary permissions to view the project in Project Web App (PWA). Ensure resources are mapped correctly in Microsoft Project Desktop before publishing.

How do I force Microsoft Project Desktop to sync with Project Online?

You can force a manual sync by opening your project in Microsoft Project Professional, navigating to the File tab, and clicking 'Publish'. This pushes all local changes directly to the Project Online server.

Can timesheet filters hide my synced tasks in Project Online?

Yes, active filters applied to the Tasks view can prevent newly published assignments from displaying. Always clear your filters in the Tasks view to confirm whether the tasks have successfully synced from the desktop client.

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