Forum Discussion

Copper Contributor

Mar 11, 2023

Exchange 2016 Event 2159 ADAccess Validation Failed

We intermittently see event id 2159 generated on our Exchange 2016 Server (CU23 Jan23SU). They seem to have appeared sometime in the past month. We tend to see about 50-150 events per day. We've e...

Exchange Server

jlando

Copper Contributor

Jun 30, 2023

DrShutt, ronenu and h1ckman - Any chance you guys are using (or in the process of rolling out) CS Identity Protection? DrShutt's comment about LDAP queries being changed has me wondering if CS Identity Protection isn't passing those queries through correctly.

ronenu

Copper Contributor

Jun 30, 2023

Yes i am using CS identity protection