Applies to: Exchange Server 2013

This cmdlet is available only in on-premises Exchange Server 2013.

Use the Add-ContentFilterPhrase cmdlet to define custom words for the Content Filter agent. A custom word is a word or phrase that the administrator sets for the Content Filter agent to evaluate the content of an e-mail message and apply appropriate filter processing.

Add-ContentFilterPhrase -Influence <GoodWord | BadWord> -Phrase <String> [-Confirm [<SwitchParameter>]] [-DomainController <Fqdn>] [-WhatIf [<SwitchParameter>]]

This example adds the phrase Free credit report to the Block phrase list. Any messages that contain this phrase will be marked as spam by the Content Filtering agent.

Add-ContentFilterPhrase -Phrase "Free credit report" -Influence BadWord

The Add-ContentFilterPhrase cmdlet adds phrases to the Allow or Block phrases list.

You need to be assigned permissions before you can run this cmdlet. Although all parameters for this cmdlet are listed in this topic, you may not have access to some parameters if they're not included in the permissions assigned to you. To see what permissions you need, see the "Anti-spam features" entry in the Anti-spam and anti-malware permissions topic.


Parameter Required Type Description




The Influence parameter specifies whether the phrase being added will cause the messages that contain the phrase to be allowed or blocked. Valid values are GoodWord and BadWord.

A message that contains a custom word or phrase that has an Influence value of GoodWord is automatically assigned a spam confidence level (SCL) rating of 0 and therefore bypasses downstream spam processing. A message that contains a custom word or phrase that has an Influence value of BadWord is automatically assigned an SCL rating of 9 and therefore is treated as spam.




The Phrase parameter specifies a custom word or phrase for the Content Filter agent. When you pass an argument, you must enclose the Phrase parameter in quotation marks (") if the phrase contains spaces, for example: "This is a bad phrase". Custom phrases must be less than 257 characters in length.




The Confirm switch causes the command to pause processing and requires you to acknowledge what the command will do before processing continues. You don't have to specify a value with the Confirm switch.




The DomainController parameter specifies the fully qualified domain name (FQDN) of the domain controller that writes this configuration change to Active Directory.

The DomainController parameter isn't supported on Edge Transport servers. An Edge Transport server uses the local instance of Active Directory Lightweight Directory Services (AD LDS) to read and write data.




The WhatIf switch instructs the command to simulate the actions that it would take on the object. By using the WhatIf switch, you can view what changes would occur without having to apply any of those changes. You don't have to specify a value with the WhatIf switch.

To see the input types that this cmdlet accepts, see Cmdlet Input and Output Types. If the Input Type field for a cmdlet is blank, the cmdlet doesn’t accept input data.

To see the return types, which are also known as output types, that this cmdlet accepts, see Cmdlet Input and Output Types. If the Output Type field is blank, the cmdlet doesn’t return data.