Explanation:

Box 1: Get-CsUserCallingSettings
The Get-CsUserCallingSettings cmdlet will show the call forwarding, simultaneous ringing, call group and delegation settings for a user.
This cmdlet shows the call forwarding, simultaneous ringing, call group and delegation settings for a user. It will also show any call groups the user is a member of and if someone else has added the user as a delegate.
Box 2: ForwardingTarget
Example.
This example shows that [email protected] has simultaneous ringing set (IsForwardingEnabled and ForwardingType) to [email protected] (ForwardingTarget and ForwardingTargetType) and if the call has not been answered (IsUnansweredEnabled) within 20 seconds (UnansweredDelay) the call is routed to voicemail (UnansweredTargetType).
Get-CsUserCallingSettings -Identity [email protected]
SipUri : sip:[email protected]
IsForwardingEnabled : True
ForwardingType : Simultaneous
ForwardingTarget : sip:[email protected]
ForwardingTargetType : SingleTarget
IsUnansweredEnabled : True
UnansweredTarget :
UnansweredTargetType : Voicemail
UnansweredDelay : 00:00:20
Delegates :
Delegators :
CallGroupOrder : InOrder
CallGroupTargets : {}
GroupMembershipDetails :
GroupNotificationOverride :
Incorrect:
* Not Get-CSOnlineVoicemailPolicy.
Use the Get-CsOnlineVoicemailPolicy cmdlet to get a list of all pre-configured policy instances related to Cloud Voicemail service.
This cmdlet retrieves information about one or more voicemail policies that have been configured for use in your organization. Voicemail policies are used by the organization to manage Voicemail-related features such as transcription.
Reference:
https://docs.microsoft.com/en-us/powershell/module/teams/get-csusercallingsettings