The extension of the Outlook search functionality to mails only stored on the server is not working properly.
If Outlook is in cached mode and only a limited number of mails/timeframe is cached, it is not possible to extend the search to the mails stored on the server.
How it should work and is working on Exchange:
- You enter a search term in Outlook
- Outlook searches the local OST store
- You can then click "further results"
- Results from the server & .ost are shown (all results from the whole mailbox)
With grommunio as backend, only steps 1-3 work, while you can click extend search to server - no actual results from the server are shown.