Michael,
What you say about that O365 feature only working when users are on the same microsoft domain is my understand as well (unfortunately).
To remove an app from Canvas, here are the steps:
- Go to the Admin area where you added the LTI app and click on Settings
- Click on the Apps tab
- Click the View App Configurations button
- Find the App you want to remove, click the Gear icon to the far right and select Delete
If the App was added at a high level than you are currently accessing it you will not be able to remove it. For instance, if the App was added a the Root account but you are trying to remove it from a sub-account or course, you will cannot do it. You need to go to the same spot as where it was added to do so.
Hope that helps,
Rick
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