Вопрос по – Какое хранилище я должен использовать для плагина Outlook?
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For Outlook-managed storage you could look into using
StorageItemwhich is a hidden item inside a given folder (Inbox, etc.). Using the
StorageItemyou can add custom user properties and file attachments.
You can also create new Folder and mark it as hidden using the
PR_ATTR_HIDDENflag. Adding any mail items or journal items would only be visible to your add-in since you can access hidden folders via the API - but not via Outlook interface.
I've also seen users store information inside Outlook journal items serialized as XML (as is done by jello-dashboard).
You could create a custom store via
AddStoreto construct a local PST.
Alternately, you could store data external to the Outlook system for consumption by your addin. External stores could be local Environment paths, local/remote databases, or web service calls.