Recipient user name not unique.

Subject:      Undeliverable message

------- Failure Reasons  --------

Recipient user name  not unique.  Several matches found in Name & Address Book.

What can i do, i can't send him mail
Who is Participating?
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.

Well, it probably means what it says.
There are several entries of this user in your personal N&A.
Open it and check the entries, see if you can delete the duplicates.
You should also check that you don't have his name in your personal address book, and that if you have cascaded address books on your Notes server, he's only in one of them.
mummiAuthor Commented:
I can just "comment" i can't give any points
was it correct ?

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
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
Lotus IBM

From novice to tech pro — start learning today.