What does the System Admin > Grade Status Delete tool do?
This is in my staging environment, where we're testing Learn 9.1 with the Q2 2016 release CU5. Our production environment, which has Q2 2016 CU4, does not have this tool.
The Grade Status Delete tool is part of the Grades Journey building block. You can find more info on it here:
Grades Journey | Blackboard Help
Your production must not have have that building block installed or available.
You're right; we don't have the Grades Journey B2 on production.
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