Got two mailbox servers. Set logging level for Extended Send As on both to Expert.
Both servers got rebooted last night.
Exchange Auditing log on server 1 is now showing entries for this, but nothing on server 2.
I created a test user to test this and gave my own user both send as and full access permissions. Then, I changed the from field in outlook to send as this user.
Nothing in exchange auditing log on either server. Its as if this logging level was never enabled. Checked setting and its there as expert.
One thing - as per previous question, I seem to be able to SEND AS any user which is a bit worrying. Just wondered if the fact Im domain admin makes a difference (and it doesnt log it).