• Estimated time to complete each procedure: 15 minutes
  
  
• You need to be assigned permissions before you can perform this procedure or procedures. To see what permissions you need, see the "Anti-spam features" entry in the Anti-Spam and Anti-Malware Permissions topic, and the "Anti-spam" entry in the Recipients Permissions topic.
  
  
• By default, anti-spam features aren't enabled in the Transport service on a Mailbox server. Typically, you only enable the anti-spam features on a Mailbox server if your Exchange organization doesn't do any prior anti-spam filtering before accepting incoming messages. For more information, see Enable Anti-Spam Functionality on a Mailbox Server.
  
  
• You can't use the Exchange admin center (EAC) to perform this procedure. You can only use the Shell.
  
  
• The Junk Email Folder SCL threshold value behaves differently than the SCL delete, reject, and quarantine values. For more information, see Spam Confidence Level Threshold.
  
  
• For information about keyboard shortcuts that may apply to the procedures in this topic, see Keyboard Shortcuts in the Exchange Admin Center.
  
  

Tip:
Having problems? Ask for help in the Exchange forums. Visit the forums at: Exchange Server, Exchange Online, or Exchange Online Protection

Use the Shell to configure anti-spam features on a single mailbox

To configure the anti-spam settings on a single mailbox, use the following syntax.

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Set-Mailbox <MailboxIdentity> -AntispamBypassEnabled <$true | $false> -RequireSenderAuthenticationEnabled <$true | $false> -SCLDeleteEnabled <$true | $false | $null> -SCLDeleteThreshold <0-9 | $null> -SCLJunkEnabled <$true | $false | $null > -SCLJunkThreshold <0-9 | $null> -SCLQuarantineEnabled <$true | $false | $null > -SCLQuarantineThreshold <0-9 | $null> -SCLRejectEnabled <$true | $false | $null > -SCLRejectThreshold <0-9 | $null>

This example configures the mailbox of a user named Jeff Phillips to bypass all the anti-spam filters and to have messages that meet or exceed a Junk Email folder SCL threshold of 5 delivered to his Junk Email folder in Microsoft Outlook.

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Set-Mailbox "Jeff Phillips" -AntispamBypassEnabled $true -SCLJunkEnabled $true -SCLJunkThreshold 4

How do you know this worked?

To verify that you have successfully configured the anti-spam features on a single mailbox, do the following:

1. Run the following command:
   
   

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   Get-Mailbox <MailboxIdentity> | Format-List SCL*,Bypass*,*SenderAuth*

2. Verify the value displayed is the value you configured.
   
   

Use the Shell to configure anti-spam features on multiple mailboxes

To configure all the anti-spam settings on multiple mailboxes, use the following syntax.

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Get-Mailbox [<Filter>]| Set-Mailbox <Anti-Spam Settings>

This example enables the SCL quarantine threshold with a value of 7 on all mailboxes in the Users container in the Contoso.com domain.

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Get-Mailbox -OrganizationalUnit Contoso.com\Users | Set-Mailbox -SCLQuarantineEnabled $true -SCLQuarantineThreshold 7

How do you know this worked?

To verify that you have successfully configured the anti-spam features on multiple mailboxes, do the following:

1. Run the following command:
   
   

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   Get-Mailbox [<Filter>] | Format-List Name,SCL*,*SenderAuth*

2. Verify the values displayed are the values you configured.
   
   

Use the Shell to configure the junk email threshold for all mailboxes in your organization

Run the following command:

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Set-OrganizationConfig -SCLJunkThreshold <Integer>

This example sets the organization's junk email threshold to 5.

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Set-OrganizationConfig -SCLJunkThreshold 5

How do you know this worked?

To verify that you have successfully configured the junk email threshold for all mailboxes in your organization, do the following:

1. Run the following command:
   
   

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   Get-OrganizationConfig | Format-List SCLJunkThreshold

2. Verify the value displayed is the value you configured.