Why is Compliance Assessment always 'in progress'?

Even in a clean tenant it might still be processing baseline settings or checking rules that take a while. Sometimes system updates can also cause delays.

Since it’s been this long, you might want to refresh the assessment or check for any issues. 

For that go into the Compliance Portal and going to the Compliance Manager. Once there, select the specific assessment you want to refresh. In the assessment details page, look for an option to either “Refresh” or “Re-run” the assessment. After refreshing, you can monitor the progress to see if it moves beyond the 51% mark. If there’s no refresh option or the assessment still seems stuck, it might be worth checking for any ongoing system issues or errors causing the delay.

Also if an assessment or improvement action shows as "In progress" for an extended period, it could indicate that the necessary actions are still pending or that the system is still processing the compliance status. This status means the device or organization is not fully compliant but is within the grace period defined by the administrator.

To address this issue, ensure that all required actions are being completed and that there are no delays in implementing the necessary controls. Regularly review the progress of improvement actions and, again, update the status accordingly.

If the issue persists, it may be helpful to check if there are any errors or if additional information needs to be provided to complete the assessment. 

Do you have the exact same assessments finished/completed in any of your tenants?