新版Outlook搜索功能失效

I am experiencing a problem with the Outlook for Mac client connected to an Exchange account. When I apply a filter by "From" (sender) in Outlook for Mac, it returns no results, despite emails existing from the specified sender. However, the same filter works correctly on outlook.com and Gmail account using the same outlook client.

Notably:

• Filtering by “To” in Outlook for Mac does NOT work on the same Exchange account.
• Filtering by "keywords" in Outlook for Mac works correctly on the same Exchange account.
• Filtering by "Subject" in Outlook for Mac works on the same Exchange account, but emails with other subject also shows up in the result.
• The issue persists even after performing a full re-index of macOS Spotlight.
• The problem appears to relate specifically to the "From” “To” filter functionality in Outlook for Mac.
• The Exchange account and emails themselves are functional and searchable via Outlook web.

I need support to diagnose and resolve why filtering by "From" & "To" filters fails on Outlook for Mac but works elsewhere, despite successful general keyword search and Spotlight re-indexing.