Role ID Purpose Description
MailboxSettings.Read 40f97065-369a-49f4-947c-6a255697ae91 Read all user mailbox settings Allows the app to read user’s mailbox settings without a signed-in user. Does not include permission to send mail.
MailboxSettings.ReadWrite 6931bccd-447a-43d1-b442-00a195474933 Read and write all user mailbox settings Allows the app to create, read, update, and delete user’s mailbox settings without a signed-in user. Does not include permission to send mail.

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