Q:

SharePoint Online - AppInv

Trying to create a cross-domain javascript call that will access data via the sp online api.
I've done the appregnew successfully, getting back confirmation that my client id and secret etc was generated.
I go next to appinv, and go to the appid field.  Press the lookup button, and it just refreshes the page, with no details.  Tried this with 2 different browsers (edge/chrome).
Any suggestions?  Have not done this before.

A:

Please fill the client id of created app in the inputbox and then click Lookup button:

Then title, App Domain and Redirect URL will be filled automatically.

