Search-Mailbox (Exchange 2013, 2016, Online): Attributes

Applies to: Exchange 2016, Exchange 2013, Exchange Online. Some information may also apply to Exchange 2010.

The -SearchQuery parameter available in the Search-Mailbox command allows you to filter items stored in Exchange mailboxes using a set of item attributes and properties.

Microsoft doesn’t offer documentation regarding attributes that can be used with the -SearchQuery parameter, so I decided to create my own list.

Unfortunately, not all properties indexed by Exchange search are available (but there are a few extra ones that may come in handy).

Queryable attributes and values

AttributeValue typeDescriptionExample
subjectStringExact phrases or keywords in subjects of items.subject:"invoice for"
bodyStringAny item property that contains the specified string value.body:microsoft
attachmentStringExact phrases or keywords in attachment filenames.attachment:specialoffer.zip
toStringSMTP address, display name, or alias of user in TO field.to:"George Kaplan"
fromStringAs above for the FROM field.from:i.johnson@alphaville.fr
ccStringAs above for the CC field.cc:kowalski +codetwo.com
bccStringAs above for the BCC field.bcc:harry lime
participantsStringAs above for all people fields.participants:administrator
categoryStringNames or parts of names of default Outlook categories.category:category -green
importanceStringAvailable values: normal, high, low. Default is "normal".importance: high OR low
kindItem typeAvailable values:
- contacts
- docs
- email
- faxes
- im
- journals
- meetings
- notes
- posts
- rssfeeds
- tasks
- voicemail
kind:email OR contacts
sentDateSpecific date or time range in which the item was sent.

Format: MM/dd/yyyy or date interval (today, yesterday, this week, this month, last month, this year, last year)
sent:9/1/2014..9/1/2016

sent:"last month"
receivedDateAs above for when the item was received.received>=1/1/2015
hasattachmentBooleanTrue if item has at least 1 attachment. (only Exchange 2016 and Online)hassattachment:true
isflaggedBooleanTrue if item is flagged. (only Exchange 2016 and Online)isflagged:true
isreadBooleanTrue if item is read. (only Exchange 2016 and Online)isread:false
sizeNumberSize of item (including attachments) in bytes.size>1000000

Operations on multiple attributes and values

Search-Mailbox queries are performed using a slightly simplified version of Microsoft’s Keyword Query Language (KQL).

All attributes and their values listed in the table above can be combined using logical operators AND, OR and NOT (case sensitive).

Note: + / can also be used as substitutes for AND/NOT.

For example:

Search-Mailbox -SearchQuery '(subject:"invoice for" -codetwo) AND (from:sales OR accounting)' ...

translates to: Search for items sent by people with “sales” or “accounting” in names or addresses, and the phrase “invoice for” in the Subject field, excluding those with the string “codetwo” in the Subject.

Numerical values (and date intervals!) can be compared using the following operators:

OperatorAttribute value ...
:... contains specified value (accepts numerical and text values).
=... is equal to specified value (accepts numerical and text values).
>... is larger than specified value.
<... is smaller than specified value.
>=... is larger than or equal to specified value.
<=... is smaller than or equal to specified value.
<>... is not equal to specified value.
..... falls in the range of specified values (does not accept date intervals).

Note: On Exchange 2010 you may have to precede comparison operators with a colon (:).

As I mentioned, date intervals (today, yesterday, this week, this month, last month, this year, last year) are interpreted as numerical values, but cannot be used with the .. operator.

Dates have to be provided in the MM/dd/yyyy format (although this could be region-specific).

Dates provided as MM/dd are interpreted as MM/dd/current_year.

For example:

Search-Mailbox -SearchQuery 'received="last month" AND received>10/10/2016' ...

translates to: items received between the 10/10/2016 and 10/31/2016 (since last month was October).

Search-Mailbox -SearchQuery 'size:1000..900000' ...

translates to: items with size falling between 1000 and 900000 bytes.

If you have questions or comments about any of the above information, post them in the comments section – I will try to respond as soon as possible.

Further reading

How to delete email from mailboxes on Exchange 2016 / 2013 / 2010 / Online

CodeTwo solutions for Exchange on-premises

CodeTwo solutions for Office 365

Search-Mailbox (Exchange 2013, 2016, Online): Attributes by

4 thoughts on “Search-Mailbox (Exchange 2013, 2016, Online): Attributes


  1. isread does not seem to be a valid attribute for Exchange 2013. Can you elaborate how you were able to determine that this attribute will work in Search-Mailbox -SearchQuery?

    I’ve been trying to get a script to work with isread for quite some time and have hit many roadblocks.

  2. How do search successfully with a subject that includes a colon? For example: I have an email I need to delete out of a mailbox with the following subject:

    RE: this a bad email

    Notice the colon. When I try to use search-mailbox, it returns zero results. I would assume this is because a colon something recognized by the query language and thus the search is not carried out correctly.

    • Hi Tom,

      Please try using this syntax:

      -SearchQuery 'subject=RE: this a bad email'

      If it doesn’t work, please let me know what version of Exchange you are running.

      Best regards,
      Adam

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