User Hunting

Find all machines on the current domain where the current user has local admin access

Find-LocalAdminAccess -Verbose

Find-WMILocalAdminAccess.ps1
Find-PSRemotingLocalAdminAccess.ps1

Find computers where a domain admin (or specified user/group) has sessions:

Find-DomainUserLocation -Verbose
Find-DomainUserLocation -UserGroupIdentity "RDPUsers"

Find computers where a domain admin session is available and current user has admin access (uses Test-AdminAccess)

Find-DomainUserLocation -CheckAccess

Find computers (File Servers and Distributed File servers) where a domain admin session is available

Find-DomainUserLocation -Stealth