Domain requirements

The SnapCenter Server must be installed on a server in the same domain as the plug-in hosts or on servers in trusted domains.

Note: Data protection using SnapCenter requires a two-way trust relationship between the SnapCenter Server domain and the plug-in domain. The SnapCenter Server domain and the plug-in domain must have a trust relationship between the two domains using the Microsoft Active Directory Domains and Trusts snap-in. While domain trusts, multidomain forests, and cross-domain trusts are supported, cross-forest domains are not.
Note: After the SnapCenter Server is installed, you must not change the domain in which the SnapCenter host is located. If you remove SnapCenter Server from the domain it was in when SnapCenter Server was installed and then try to uninstall SnapCenter Server, the uninstall operation fails.

See Microsoft documentation about Active Directory Domains and Trusts at https://technet.microsoft.com/en-us/library/cc770299.aspx.

For installation, you must have domain user rights with local administrator credentials.