Additional file-related features and issues within Microsoft Teams for Education
Hi Noor Syamimi binti. Ab Manah,
I go through the post carefully, we may not edit pdf directly in MS teams and the annotations may not saved, so that they are missing after you reopen the assignment. a workaround could be edit the pdf with Acrobat Reader and save the changes to SharePoint. You may check the video for more information:
Microsoft Teams Assignments or online papers corrections using Acrobat Reader - YouTube
***Disclaimer:****Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.*
Best Regards,
Clark