In fact I want to create shortcut for existing user for example I have two OUs name 1 and 2 inside OU 1 there is user1 and I want create shortcut for user1 inside OU 2? another meaning I want user1 to be member in OU 1 and 2.
I don't believe AD works that way. As far as I know, an object can only be a member of one OU.
If you're trying to apply group policies, it would make sense to create a security group and have the policy applied to all members of the group.