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Although the Adams Rite Bottom Rail deadbolt can work with most common mortise cylinders based on your needs.
U-change, to my understanding is a system by which you can easily, albeit with the use of a special tool, allow you to lock out the existing key and permit a new key to work the cylinder in seconds. My concern with the U-change system is it's convenience meaning to make a new key pass and locking out the existing key requires only the existing key and a tool that may be easily reproducible and a new U-change keyblank which would prove difficult to source direct from the manufacturer but not so when conducting a search in the internets most popular online aution site (although to this I do not have all the facts). I do see and have for about 25 - years (I understand this product has been on the market since the early 1970's), seen the U-change cylinder show up in specifications but does not occur too often. A review of this system from the manufacturer can be reviewed here: