Re: [Evolution] Providing credentials with OAuth2

[Milan Crha <mcrha redhat com>]

On Sun, 2016-09-11 at 09:47 +0100, Patrick O'Callaghan wrote:
> Failed to connect calendar 'Gmail: Birthdays'
> Credentials are required to connect to the destination host

        Hi,
it usually means that there had been some issue logging into the
calendar, which would usually follow with a password prompt, but as
this is an OAuth2 account, which has a token, not a password, then the
code cannot ask for the password and reports this error instead.

You said the error is occasional. Can it be that it works fine after
login, but say an hour a little longer it fails this way? If it's so,
or similar, then it can be due to the token being expired. It had been
addressed only very recently, for the 3.22.0 version:
https://bugzilla.gnome.org/show_bug.cgi?id=761450

        Bye,
        Milan