You can upgrade from DirXML® 1.1a, Identity Manager 2.
x, or Identity Manager 3.
x to Identity Manager 3.5. During an Identity Manager installation, you can install the Driver for Exchange 5.5 (along with other Identity Manager drivers) at the same time that the Metadirectory engine is installed. See
Installing Identity Manager
in the
Identity Manager 3.5.1 Installation Guide
.