Activities migration

Hello =)

I faced with the following situation:

When I migrate a list of Activities (Phone calls for instance), with Starting call date - more than 90 days from current date, the system inform me (Error) that it is not possible. I can migrate only Activities not earlier than 90 days from now.

Is it true? May be you know how to get round it?

Thank you in advance for comments)

BR,

Alexander