The Google team is releasing several updates to the Google Assignments LTI 1.3 tool over the next several months that will enable the tool with the same capabilities of the old Google Apps LTI tool.
External File Sharing
If your institution has external file sharing setting turned off, you used to get an error saying that external file sharing was not allowed outside of your domain if you tried to submit a Google file to Canvas as an assignment submission. With this update, Google Drive files up to 10 MB can be submitted to Canvas using Homework Submission, regardless of your domain settings.
This update allows Canvas as an exception and does not change your external file sharing setting. The update will be automatically rolled out to all users by the end of March. There is nothing you need to do to enable it.
Google Assignments LTI 1.3 + Canvas SpeedGrader
Towards the end of June, Google will begin rolling out an upgrade for the Google Assignments LTI 1.3 tool to have the same SpeedGrader capabilities as the old tool. When creating a new assignment with Google Assignments, instructors will have the option to grade student grade work using SpeedGrader or Google's grading interface. This will enable instructors to attach files to make a copy/template for each student and/or use Google's originality reports feature for plagiarism analysis while also providing instructors flexibility on their grading interface of choice.
Switch to LTI 1.3
If you have not yet adopted the LTI 1.3 tool, you can turn it on in the Developer Keys in Canvas. Then choose Google Assignments (LTI 1.3) when configuring the external tool for new assignments, and make sure the submission setting is set to “online” in Canvas.