Note that operators and functions must be CAPITALIZED, otherwise they will be treated as a regular word. Query operators must also be preceded and followed by query keywords or query phrases.
The AND operator may be used to find emails containing both specified keywords.
Outlook AND search finds "Outlook boolean search", "how to search keywords in Outlook"
The OR operator may be used to find emails containing either of two keywords.
wildcard OR "search tool" finds "Outlook search wildcard", "boolean search tool"
The NOT operator excludes any emails containing the keyword which follows it.
folder AND NOT Thunderbird finds "search all folders and emails in Outlook", but not "search folders in Thunderbird"
The boolean function ALL(term1, term2, ..., termN) is equivalent to term1 AND term2 AND ... AND termN
ALL("boolean search", "excel-like filtering", "instant search")
The boolean function ATLEASTONE(term1, term2, ..., termN) is equivalent to term1 OR term2 OR ... OR termN
ATLEASTONE("boolean search in outlook", "outlook search syntax")
The boolean function NEITHER(term1, term2, ..., termN) is equivalent to NOT term1 AND NOT term2 AND NOT ... AND NOT termN
NEITHER("windows search", "search keyword")
The boolean function NOTALL(term1, term2, ..., termN) is equivalent to NOT term1 OR NOT term2 OR NOT ... OR NOT termN
NOTALL(Outlook, Thunderbird, Outlook Express, "Windows Mail")
Search queries can use parentheses to control the logic of the query and they may appear in any combination. Every left parenthesis must have a corresponding right parenthesis. Queries can have nested parentheses.
(search AND multiple AND (emails OR folders))
A wildcard characters in a query may be used to searching for multiple items with similar, but not identical data. It allows to search all spellings of the keyword.
Matches any number of characters. You can use the asterisk (*) anywhere in a character string.
search* finds search, searching, searches, searched
Matches a single alphabet in a specific position.
"Outlook 201?" finds "Outlook 2019", "Outlook 2016", "Outlook 2013", "Outlook 2010"
Updated on April 09, 2021
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