Mailbox for User A was removed after he left our organzation. user A was having "send on behalf" permission on User B. Now whenever anybody sending meeting requests to user B it searching for user A and then bounce back. I have removed User A permissions from user B mailbox but still if i m sending meeting reqeust to user b i m getting bounce back message "Mailbox for user A is not exist in organization"
Please help me on this.