Convert a domain user SID
PS C:\Users\Torrance> Get-ADUser -Identity 'Torrance' | select SID
SID
---
S-1-5-21-1176531809-3916659391-2721709076-1144
SID
---
S-1-5-21-1176531809-3916659391-2721709076-1144
Reverse Lookup the SID
PS C:\Users\Torrance> Get-ADUser -Identity S-1-5-21-1176531809-3916659391-2721709076-1144
DistinguishedName : CN=Torrance A Jones,OU=Users,OU=EDC,DC=ad,DC=aimsparking,DC=com
Enabled : True
GivenName : Torrance
Name : Torrance Jones
ObjectClass : user
ObjectGUID : 5c338911-a8d1-4763-a488-b698fc4bb629
SamAccountName : Tor
SID : S-1-5-21-1176531809-3916659391-2721709076-1144
Surname : Jones
UserPrincipalName : [email protected]
DistinguishedName : CN=Torrance A Jones,OU=Users,OU=EDC,DC=ad,DC=aimsparking,DC=com
Enabled : True
GivenName : Torrance
Name : Torrance Jones
ObjectClass : user
ObjectGUID : 5c338911-a8d1-4763-a488-b698fc4bb629
SamAccountName : Tor
SID : S-1-5-21-1176531809-3916659391-2721709076-1144
Surname : Jones
UserPrincipalName : [email protected]