We have a test of Zoho one on the EU server. We have tried to install extensions like google drive and Mailchimp.
By connecting to the external services, an OAUTH 2 form was completed and the related access was also authorized. But the last step failed, the server returns that the Zoho account we provided does not exist.
I suppose the callback URL is on the US server, the US server could not find our account on EU server. If this would be the case, many extensions will not be working for European users.
Could you please provide a solution?