We have just set up a Google Cloud Identity domain, and have a number of users who already have consumer Google accounts using their corporate email addresses.
I've invited several of them to transfer their account to our domain - most have succeeded, but two receive a message when clicking through the process to accept the transfer request.
A pop up appears at the bottom of the screen saying
There was an error. Please try again'.
No further information is given
Does anyone know the cause and/or resolution to this error
Update: My colleagues tried accepting the request a week or so later, and strangely it worked OK. IF anyone else experiences this, it looks like it was a transient issue with transferring accounts into Organisational control.
This sounds like conflicting accounts. This could happen when users sign up for free Google services before their organization signs up for a managed Google Account. If this is the case, there is Transfer tool for unmanaged users.
If info above doesn't help you might want to check if logs contains more details about the error. In Admin console logs, or maybe in Google Cloud Project audit logs.