The manager is to meet with you in his office at 3:00 this afternoon.(这句才是地道的英语)
is to 和 will 已经包含了你说的意思------想要.
The manager means / intends to meet with you in his office at 3:00 this afternoon.（英语民族很少这样表达）
不是"将在办公室接见",是"想要在办公室接见"------------你最好不要把汉语的概念强加到英语上面.看来,你的英语感觉还在形成之中.