MS has some pwershell things to look for in your environment. Eith on-prem Exchange or Cloud-based.
This blog post might help: https://www.cardinalops.com/en/resources/detecting-microsoft-outlook-vulnerability-cve-2023-23397-sp...
You can check out our thread about this in the user group: https://splunk-usergroups.slack.com/archives/CDNHXVBGS/p1678882662724229.
Hi
I'm not a member of "splunk-usergroups on Slack" so can't see the detail you are referencing
You won't regret joining it: https://docs.splunk.com/Documentation/Community/current/community/Chat