Check grammar " Informed G that the case review is assigned and ongoing, she'll receive an email update once it's finished.

The sentence is mostly clear, but it could be improved for clarity and grammatical accuracy. Here’s a refined version: "I informed G that the case review is assigned and ongoing, and that she will receive an email update once it is finished." Alternatively, if you want to keep it concise: "I informed G that the case review is ongoing, and she will receive an email update once it is finished."