Services related to google and gmail are starting to come back again in a number of countries, but with some glitches. Canadians have also been affected by the interruption.

In all, it appears a huge range of Google services were down for about an hour this morning crossing into business operation times in multiple markets, and leading to a slight drop in pre-market trading for parent company Alphabet.

It’s also a reminder of just how far Google reaches, and how many of their services services; productivity, entertainment, and home/utility are tied up with a single, proprietary provider.

The outage appeared to be related to the company’s authentication tools, which manage how users log in to services run by both Google and third-party developers.

That means that tools that do not work without logging in, such as Gmail and Google Calendar, were unavailable entirely. Third-party services that use Google’s authentication platform continued to be accessible for users who are already logged in, but failed when users tried to sign in or out of the service.