Office Add-In deployed through O365 Admin Center Appears in Excel Ribbon but can´t be open

Question

I have deployed an Office Add-in and uploaded through the O365 Admin Center The Add-In appears in the Excel Ribbon but can use it as a message appears “We could not open the Add-In from LocalHost.

Should I modify anything in the Manifest File?

The Add-In was created with Yeoman and it´s addressed to “LocalHost:3000”.

It´s just a template (taskpane example)

Many thanks in advance,.! Regards, José.

Answer 1

Localhost is only used to host the add-in during development. If you have deployed the add-in with Centralized Deployment , then you should be hosting the add-in on a web server or cloud account. In that case, the URLs in the manifest should be changed to the domain that is hosting the add-in.