Technically, you don't want Outlook. You want your email . Using Thunderbird Portable (which does exist) with an IMAP connection to your Exchange server gives you 90% of the functionality with 0% of the headache.
If you specifically need a local client that runs entirely from a USB drive, these third-party open-source or freeware options are the industry standards: Outlook Express - Fully Portable? | PortableApps.com download outlook portable
Unless you are a sysadmin running legacy machinery in a factory (the one demographic that genuinely uses this), Technically, you don't want Outlook
Official "portable" versions of Microsoft Outlook do not exist, and attempting to download one often carries significant . Safety Report: "Outlook Portable" Downloads If you specifically need a local client that
To understand why a true "Portable Outlook" doesn't exist, you have to look under the hood. Outlook is not an app; it is an .
Creating a truly "portable" version of Outlook requires stripping these dependencies and redirecting registry calls on the fly. This is technically achieved through "application virtualization."