App Registrations pop up same day I have trouble with user accounts

tech 0 Reputation points

Hello: I'm newish to Azure for exchange and had some bumps. I have one question, the same day I had problems with a few users I noticed these apps in their accounts and deleted them but here they are sitting I'm my All Applications my question is can I delete them safely or are they necessary? Thank You.Screenshot 2023-04-21 134357

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