It sounds like you may have chosen the wrong product. If you are looking to deploy via Office 365 admin center, you need to select https://store.suitecrm.com/addons/suitecrm-outlook-plugin-for-mac (works for Windows as well)
Hi, this typically happens if your anti-virus software intercepted some of the files during installation and prevented them from being installed. Please check you AV software if any FrontEnd files are under quarantine and release them and then try uninstalling again. If you are not using third party AV software, please check Windows Defender.
It's not an issue of licensing. It was done in order to prevent duplication of records. You cannot run multiple copies of FrontEnd on different computers and connect them to the same accounts.
The Office 365 URL is: https://outlook.office365.com/EWS/Exchange.asmx
The installation/admin guide is at: https://www.outlook-integration.com/Docs/frontendexchange
