You can upgrade to Update Manager 5.5 from Update Manager version 4.x, Update Manager 5.0 and Update Manager 5.1 that are installed on a 64-bit operating system. Direct upgrades from Update Manager 1.0 Update 6 and earlier, and Update Manager systems that are installed on a 32-bit platform are not supported.

If you are running an earlier version of Update Manager on a 32-bit platform, you cannot perform an in-place upgrade to Update Manager 5.5. You must use the data migration tool that is provided with Update Manager 5.0 installation media to move your Update Manager system from 32-bit operating system to Update Manager 5.0 on a 64-bit operating system, and then perform an in-place upgrade from version 5.0 to version 5.5. For detailed information how to use the data migration tool, see the Installing and Administering VMware vSphere Update Manager documentation for Update Manager 5.0.

When you upgrade Update Manager, you cannot change the installation path and patch download location. To change these parameters, you must install a new version of Update Manager rather than upgrade.

Previous versions of Update Manager use a 512-bit key and self-signed certificate and these are not replaced during upgrade. If you require a more secure 2048-bit key, you can either perform a fresh installation of Update Manager 5.5, or use the Update Manager Utility to replace the existing certificate.

Scheduled tasks for virtual machine patch scan and remediation are not removed during the upgrade. After the upgrade, you can edit and remove scheduled scan tasks that exist from previous releases. You can remove existing scheduled remediation tasks but you cannot edit them.

Virtual machine patch baselines are removed during the upgrade. Existing scheduled tasks that contain them run normally and ignore only the scanning and remediation operations that use virtual machine patch baselines.

You must upgrade the Update Manager database during the Update Manager upgrade. You can select whether to keep your existing data in the database or to replace it during the upgrade.

The Java Components (JRE) required by Update Manager are installed or upgraded silently on the system when you install or upgrade Update Manager. Starting with Update Manager 5.5 update 1, you can upgrade the Java Components separately to a version that is released asynchronously from Update Manager releases.