Resource Reservation Using Calnder in Inotes

When Resource Reservation is made from iNotes Clent,

  1. Its allowing to select the rooms already booked.

Requirement : It should prompt a message box “The room is already booked by K Rama Krishna” and it should not allow the user to send the invitation

The same will be applicable to resource also

  1. Its displaying a message “This entry is being created in the past. Create anyway”

Requirement : It should prompt a message box “Entries in past date are not allowed” and it should not allow the user to send the invitation.

I could restrict this in Notes Client, But in iNotes Client, Iam having difficulty

I would be grateful if somebody can help me