Active Directory

Commands

Get-ADObject – Gets one or more Active Directory objects

Find the objectSID of a user

Get-ADObject -Identity "CN=John Doe,OU=Users,OU=Site,DC=company,DC=com" -Properties objectSID

DistinguishedName : CN=John Doe,OU=Users,OU=Site,DC=company,DC=com
Name              : John Doe
ObjectClass       : user
ObjectGUID        : 9f412fe7-4b01-4f80-a13b-ccf9af09d9ef
objectSID         : S-1-5-21-1212883317-1493175028-447764388-3133

https://learn.microsoft.com/en-us/powershell/module/activedirectory/get-adobject