When you migrate vCenter Server, vCenter Single Sign-On, or Platform Services Controller on Windows to an appliance, the installer does a pre-check, for example, to verify that enough space is available on the virtual machine or physical server where you are migrating, and verifies that the external database, if any, can be successfully accessed.

When you migrate vCenter Single Sign-On (version 5.5) or Platform Services Controller (version 6.0), vCenter Single Sign-On is included as part of the Platform Services Controller. When you provide the information about the vCenter Single Sign-On service, the installer uses the administrator account to check the host name and password, to verify that the details of the vCenter Single Sign-On server you provided can be authenticated before proceeding with the migration process.

The pre-migration checker performs checks for the following aspects of the source environment:

vCenter Server, Platform Services Controller, or vCenter Single Sign-On version to verify that migration is supported

SSL certificates validity and compatibility with system names

Network connections

DNS resolution

Internal and external ports used

External database connectivity

Administrator privileges on the Windows machine

Required disk space for exporting configuration data

NTP server validation

Any credentials that you enter

The pre-migration checker performs checks for the following aspects of the target environment:

Minimum processor requirements

Minimum memory requirements

Minimum disk space requirements

Administrator privileges on the target host

Any credentials that you enter