You need to use the AdvancedSearch method of the Application class which allows to search for items in multiple folders. The Restrict and Find/FindNext methods of the Items class allow to search for items in the single folder only.
The key benefits of using the AdvancedSearch method in Outlook are:
- The search is performed in another thread. You don’t need to run another thread manually since the
AdvancedSearch
method runs it automatically in the background.
- Possibility to search for any item types: mail, appointment, calendar, notes etc. in any location, i.e. beyond the scope of a certain folder. The
Restrict
and Find
/FindNext
methods can be applied to a particular Items collection (see the Items property of the Folder class in Outlook).
- Full support for DASL queries (custom properties can be used for searching too). You can read more about this in the Filtering article in MSDN. To improve the search performance, Instant Search keywords can be used if Instant Search is enabled for the store (see the IsInstantSearchEnabled property of the Store class).
- You can stop the search process at any moment using the
Stop
method of the Search class.
Read more about the AdvancedSearch
method in the Advanced search in Outlook programmatically: C#, VB.NET article. Note, the Outlook object model is common for all programming languages, so it doesn't matter whether Python or C# is used.