I'm developing an Outlook add-in for Office 365 (https://dev.outlook.com/MailAppsGettingStarted/GetStarted), but I have to create a Script with PowerShell or CMD.
If you are looking for a way to install outlook addins through scripting, please take a look at https://technet.microsoft.com/en-us/library/jj218722(v=exchg.160).aspx
In particular, you can use -FileData (to install your manifest from file) or -Url (to install from a Url that points to your manifest).
For a enterprise wide deployment, you should definitely look at install it as an organization addin (using -OrganizationApp in powershell or EAC), so that the addin is available for all users. https://technet.microsoft.com/en-us/library/jj943752(v=exchg.150).aspx