Free trial: 50 items per folder.
Find the capabilities that matter to your task, from supported formats to processing options.
Watch our step-by-step walkthrough to verify offline mailbox parsing, real-time message previews, and zero-cloud conversion workflows before evaluating your own archives.
Use the free trial to check whether the result fits your task. Here is what to look for when testing your own data.
Authenticate using modern OAuth 2.0 or app password. Select the mail folders you intend to archive.
Choose your local storage format (PST, MBOX, EML, PDF) and configure date filters.
Inspect the 50 downloaded items per folder on your local disk to confirm attachments and folder structure before full sync.
Check your computer before installing Office 365 Backup Tool. Allow additional storage for your source files and output.
Download the free evaluation →Trial limit: 50 items per folder.
Transparent one-time pricing with dedicated multi-year updates & zero recurring fees.
1-Year License & Updates
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2-Year License & Updates
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3-Year License & Updates
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No. Prism Office 365 Backup Tool operates completely standalone. It connects directly via Microsoft Graph API and modern authentication, eliminating any requirement for Microsoft Outlook, MAPI subsystems, or local Office installations.
Yes. When authenticating with appropriate administrative or delegated permissions, Prism automatically discovers Primary Mailboxes, Shared Mailboxes, and secondary In-Place Archive folders.
Prism features an adaptive rate limiter with exponential backoff and jitter. When Microsoft Graph sends a rate limit signal, Prism reads the Retry-After header and pauses transmission gracefully before resuming without dropping connections.
Prism maintains an internal SQLite transaction journal. When connectivity is restored, click Resume in the Resume Center. The engine skips all previously downloaded emails and resumes from the exact last successful item.
Prism runs on your local computer. All emails and credentials stream directly through an encrypted SSL/TLS tunnel between Microsoft Azure data centers and your local computer storage.
Yes. Prism generates spec-compliant ISO 19005 PDF documents with original email attachments physically embedded inside the PDF file as clickable binary attachments.
