I built an open-source, offline OST to PST converter for Windows

K

Kirin

New Member
OS Version(s)
  1. Windows
Outlook version
Outlook 365 64 bit
Operating system::    Windows 11 26H2
Outlook version:     2609 Build 16.0.2043
Email type or host:    Microsoft 365
I’ve been working on OST2PST, a C++ tool that reads an Outlook OST and creates a Unicode PST without requiring Outlook, MAPI, an account, or network access. It includes a portable Windows GUI and a CLI.

In one recorded run, it converted a 26.25 GB OST to a 22.98 GB PST in about 32 minutes, with no skipped items and internal verification passing. I’ve also opened and checked mail and attachments from a smaller converted sample in Outlook. Compatibility across more OST files and Outlook versions still needs testing.

The project is MIT licensed. I’d welcome feedback, especially reproducible issues from people testing with copies of their OST files: GitHub - Hyper-Beast/OST2PST: Offline OST to PST converter for Windows with a native GUI
 
Das klingt nach einem sehr nützlichen Werkzeug, besonders für verwaiste OST-Dateien, bei denen kein ursprüngliches Outlook-Profil mehr verfügbar ist. Für einen breiteren Praxistest wären Angaben zu verschlüsselten Nachrichten, wiederkehrenden Kalendereinträgen und sehr großen Anhängen hilfreich. Eine automatisch erzeugte Zusammenfassung mit Anzahl der konvertierten Ordner, Elemente und Fehler würde die Kontrolle nach der Konvertierung zusätzlich erleichtern.
 
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