A cloud-based task management app from Microsoft that helps users organize and manage daily tasks across devices.
Hi @Thomas Horsman,
Welcome to the Microsoft Q&A forum.
Thank you for contacting us. I would like to provide you with the following information:
To receive more in-depth support and check whether there are any policies or settings in your tenant that may be blocking synchronization between Planner and To Do, we recommend that you create a support ticket with Microsoft Technical Support for further investigation.
To create a ticket, please follow the steps below:
Note: The following steps require Administrator privileges for the tenant. If you do not have administrator rights, please contact your organization’s IT department for assistance.
Step 1: Go to https://admin.microsoft.com
Step 2: Click Help & support
Step 3: Enter the subject: Request support to check synchronization between Planner and To Do
Step 4: Click Contact support
Step 5: Choose your preferred contact method
I hope this information is helpful.
If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you.
I look forward to continuing the conversation.
After the system receives the ticket and assigns it to an agent, a Microsoft support engineer will proactively contact you to assist with further investigation of this issue.