Old info on contact person

Hi,

I have a user which uses the Lync 2010 app on his iPhone. Some of his contacts contains old info - the contacts are other internal users.

One of them has 2 email adresses and 6 telephone numbers. 

If I lookup the same contact he has 1 email address and 3 telephone numbers.

It seems to be old data. 

Earlier we had problems with users having duplicate contacts - some with old data.

We solved this with this powershell command:

Set-CsClientPolicy Global -EnableExchangeContactSync $false

And then deleted the "Lync contacts" folder through OWA.

This particular doesn't have the "Lync contacts" folder.

Any ideas on how to solve this problem?

Thanks in advance.