# Get some events
$Computer = 'dc01'
$User = 'rob'
$Events = Get-WinEvent -ComputerName $Computer -LogName Security -FilterXPath "*[System[(EventID='4776']][EventData[Data='$User']]"
$xml = [xml]$Events[0].ToXml()
The document looks like this.
<Event xmlns='http://schemas.microsoft.com/win/2004/08/events/event'>
<System>
<Provider Name='Microsoft-Windows-Security-Auditing' Guid='{54849625-5478-4994-A5BA-3E3B0328C30D}'/>
<EventID>4776</EventID>
<Version>0</Version>
<Level>0</Level>
<Task>14336</Task>
<Opcode>0</Opcode>
<Keywords>0x8020000000000000</Keywords>
<TimeCreated SystemTime='2018-07-31T17:28:26.535931100Z'/>
<EventRecordID>8229660506</EventRecordID>
<Correlation/>
<Execution ProcessID='632' ThreadID='6908'/>
Channel>Security</Channel>
<Computer>dc01</Computer>
<Security/>
</System>
<EventData>
<Data Name='PackageName'>MICROSOFT_AUTHENTICATION_PACKAGE_V1_0</Data>
<Data Name='TargetUserName'>rob</Data>
<Data Name='Workstation'>robpc</Data>
<Data Name='Status'>0x0</Data>
</EventData>
</Event>