Ldapsearch.exe is a tool that was included with Windows 2000, it isn't used anymore, and was superseded by dsquery in Server 2003. However if you are querying Active Directory, you should just use the Active Directory PowerShell Module instead, which is included with the Remote Server Admin Tools.

Either on a DC or install RSAT and enable AD Tools:

Open "Active Director Module for Windows PowerShell" (find it in with the other Admin tools)

get-aduser -id {guid}

Or for any object:

get-adobject -id {guid}

Might want to pipe it through a format-list to make it readable:

get-adobject -id {guid} | fl