Test account reported as MSExchange ADAccess error ?


I'm using Exchange Server 2010 SP3 and during the health check, I noticed that the following event is logged intermittently (random) no specific pattern:

Log Name:      Application
Source:        MSExchange ADAccess
Date:          12/04/2015 2:17:28 PM
Event ID:      2156
Task Category: Validation
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      PRODHTCAS01-VM.domain.com
Process w3wp.exe () (PID=4516). Recipient object CN=dummy user2,OU=Old Employees,DC=domain,DC=com read from DC2k3-02-VM.domain.com failed validation. A data validation exception will be given.  Set event logging level for Validation category to Expert to get additional events about each failure.

So I wonder if this is a real security issue from external people or this is can be ignored after deleting the user account drom AD console ?
LVL 10
Senior IT System EngineerIT ProfessionalAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

that account might have corrupted or have incomplete values....can disable it.....see this link for further details....


Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Senior IT System EngineerIT ProfessionalAuthor Commented:
Thanks !
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.