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Email Plus-Addressing Check [CHK-1054]

This check verifies if the plus sign (+) can be used in recipients' email addresses in Exchange Online.

Rationale

Enabling plus-addressing allows employees to create unlimited aliases for their own mailboxes. This can help trace the source of potential data leaks and filter emails more effectively.

Fix

An automated fix is available through Attic.

Manual steps:

  1. Connect to Exchange Online via Connect-ExchangeOnline.
  2. Run the following command: Set-OrganizationConfig -DisablePlusAddressInRecipients $false.

Impact

After the fix, employees will be able to use the plus sign (+) to create aliases for their email addresses.

More Information

For more details on Plus Addressing, visit Microsoft's Documentation.

Note: This check does not function for Hybrid Microsoft installations where the Email and/or AD functions are synchronized from the cloud to servers in your own network.