Connect-VIServer

This cmdlet establishes a connection to a vCenter Server system. The cmdlet starts a new session or re-establishes a previous session with a vCenter Server system using the specified parameters.When you attempt to connect to a server, the server checks for valid certificates. To set the default behavior of VMware PowerCLI when no valid certificates are recognized, use the InvalidCertificateAction parameter of the Set-PowerCLIConfiguration cmdlet. For more information about invalid certificates, run 'Get-Help about_invalid_certificates'.You can have more than one connection to the same server. To disconnect from a server, you need to close all active connections to this server. VMware PowerCLI supports working with multiple default servers. If you select this option, every time when you connect to a different server by using the Connect-VIServer cmdlet, the new server connection is stored in an array variable together with the previously connected servers, unless the NotDefault parameter is set. This variable is named $DefaultVIServers and its initial value is an empty array. When you run a cmdlet and the target servers cannot be determined from the specified parameters, the cmdlet runs against all servers stored in the array variable. To remove a server from the $DefaultVIServers variable, you can either use the Disconnect-Server cmdlet to close all active connections to the server, or modify the value of $DefaultVIServers manually.If you choose to work with a single default server, when you run a cmdlet and the target servers cannot be determined from the specified parameters, the cmdlet runs against the last connected server. This server is stored in the $defaultVIServer variable, which is updated every time you establish a new connection.To switch between single and multiple default servers working mode, use the DefaultServerMode parameter of the Set-PowerCLIConfiguration cmdlet. Working with multiple default servers will be enabled by default in a future release.