Go to the Control-C User portal - Login
https://backup.control-c.com/Account/Login
1. Click on the red Xero icon to reconnect...
2. You will be directed to login to Xero to authenticate Control-C to backup.
3. Select the Xero organisation that you wish to reconnect...
4. You will be directed to this screen and you should see a green tick. You can now click on Company Overview...
Check that there are no other Xero organisations showing in the red Attention area... #6.
NOTE: CANT SELECT THE XERO ORG?
If you are unable to select the Xero Org because it is greyed out, then you need to go to your Xero Settings page and delete the Control-C connection and then try reconnecting again. Detailed instructions can be found in this article here