I have a machine that will not connect to a Gmail account, we just get the message that the server is rejecting the username and password even though they are correct.
We can login to the webmail ok.
When I look at the gmail connectivity we are seeing these errors - Application / device sign-in attempt (prevented)
I have checked the account and the 2 step verification is turned off
I have tried everything from changing the password to trying pop and IMAP with no effect.
At the moment POP is enabled and IMAP is disabled.