...
You need to create separate clients for G-Suite Connector add-on and Automatic sync, depends on what you are using. Use the following re-direct URI for each clients.
Re-direct URI for G-Suite add-on - https://script.google.com/macros/d/17V0Pk2A7VTevuNUbsgXMCnfgYIvN6pblZduRWjLNoNDlw5SzIem3o0Hi/usercallback
Re-direct URI for Outlook add-in - https://outlook.ienterprises.com/outlook/mscrm/src/taskpane/app/oauth/token.html
Re-direct URI for Automatic sync - https://isync.ienterprises.com/oauth2client/mscrm.php
...