Thank you Dan for this link. If I have more time and don`t forget this
post I will study this kb.

Peter

On 4 Okt., 23:13, Dan Mitchell wrote:
"Dmitry Streblechenko" wrote :

How much slower? Keep in mind that calling Restrict() will cause the
restriction to be persisted on the Exchange Server (if that is waht
you are using) potentially causing a severe performance degradation.

http://support.microsoft.com/kb/216076

is the KB article that talks about this.

-- dan