The search results are different

Hi @Cranbin ,

The differences in search results between Outlook (desktop) and Outlook on the web (OWA) can stem from several factors.

1.Indexing Differences:

Outlook Desktop: Uses a local index (Windows Search or Outlook’s built-in index). If indexing is incomplete or corrupted, older/newer emails may not appear.

OWA: Relies on the server-side index (Microsoft 365/Exchange), which is typically up to date but might prioritize recent items.

2.Cached vs. Online Mode:

In Cached Mode, Outlook stores a subset of emails locally. Older emails not downloaded may not show up in searches. Try switching to Online Mode (go to File > Account Settings > Account Name > Change > Uncheck "Cached Mode") to access the full server mailbox.

3.Sync Issues:

Ensure Outlook is fully synced. Check the status bar for sync completion. Missing emails in Outlook but present in OWA could indicate sync delays or a paused connection.

4.Search Scope:

Verify the search is scoped to "All Mailboxes" or "Current Folder" in both clients. OWA defaults to "All Folders," while Outlook might limit to a selected folder.

5.OST File Limitations:

Outlook’s local cache (OST file) has size limits. Older emails may be archived or excluded from offline storage. Adjust cached settings via File > Account Settings > Account Name > Change > Slider for "Mail to keep offline".

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WHat type of account are you using in Outlook? Which version of Outlook is it - classic Outlook for WIndows? New Outlook for Windows? Classic Outlook for Mac? New Outlook for Mac? Outlook for iOS? Outlook for Android? If it's classic Outlook, which version? What type of account (POP, IMAP, Exchange) do you use?