You can create a new role group with the required permissions by running the following PowerShell command in an elevated Exchange Management Shell (EMS): To run this script in an on-premises Exchange Server environment, you need to use an account with the ApplicationImpersonation management role. Requirements Prerequisites to run the script for Exchange Server (on-premises) ![]() If you got suspected entries in CSV file, run the script in Cleanup mode.If you only see blank things or paths to old. If step 2 generates CSV files, review the CSV file if you find suspicious thing, then go to 5.If the script execution finishes with "No vulnerable item found", no further action is required. ![]() # Then run against the batches similar to this: $batchSize = 1000 $batchNumber = 1 $count = 0 Get-Mailbox -ResultSize Unlimited | Select PrimarySmtpAddress | % Įxport-Csv -InputObject $_ -Path "Batch$batchNumber.csv" -Append Here is an example of how to break up the mailboxes into batches of 1000: It is recommended to break up the mailbox list into multiple files, so the script can be run against mailboxes in batches. On-Premises or Online)įor organizations with large number of mailboxes: Fulfill the requirements according to environment (i.e.There are two modes for the script: Audit and Cleanup.Īudit Mode: Script provides a CSV file with details of items that have the property populated.Ĭleanup Mode: Script performs cleanup on detected items by either clearing the property or deleting the item. Please see CVE-2023-23397 for more information. If required, admins can use this script to clean up the property for items that are malicious or even delete the items permanently. It is up to the admin to determine if the value is malicious or not. Download the latest release: CVE-2023-23397.ps1ĬVE-2023-23397.ps1 is a script that checks Exchange messaging items (mail, calendar and tasks) to see whether a property is populated with a non empty string value.
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