Before you configure PST ingestion without archiving, verify that your environment meets the requirements.
Applies to: User mailbox (Exchange Online (Through On-Premises Active Directory) and Exchange Online (Through Azure Active Directory), Hybrid, Journal mailbox
Requirements
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Microsoft Outlook 64-bit must be installed on the access node.
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Basic authentication is required.
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Multi-factor authentication (MFA) is optional.
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The View-Only Recipients role is required for Online service accounts.
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The Exchange Administrator role is required to run the Application check readiness report.