Information
MailTips are informative messages displayed to users while they're composing a message. While a new message is open and being composed, Exchange analyzes the message (including recipients). If a potential problem is detected, the user is notified with a MailTip prior to sending the message. Using the information in the MailTip, the user can adjust the message to avoid undesirable situations or non-delivery reports (also known as NDRs or bounce messages).
Rationale:
Setting up MailTips gives a visual aid to users when they send emails to large groups of recipients or send emails to recipients not within the tenant.
NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Solution
To remediate using PowerShell:
Connect to Exchange Online using Connect-ExchangeOnline.
Run the following PowerShell command:
$TipsParams = @{
MailTipsAllTipsEnabled = $true
MailTipsExternalRecipientsTipsEnabled = $true
MailTipsGroupMetricsEnabled = $true
MailTipsLargeAudienceThreshold = '25'
}
Set-OrganizationConfig @TipsParams
Default Value:
MailTipsAllTipsEnabled: True MailTipsExternalRecipientsTipsEnabled: False MailTipsGroupMetricsEnabled: True MailTipsLargeAudienceThreshold: 25