Apps that ask for your G Suite account username and password, to sign in directly to your G Suite-account, will no longer be able to access G Suite starting from February 15th, 2021. Google considers apps that use this login method to be ‘less secure apps’ and will only allow logins with an OAuth token.
In addition, from June 15, 2020, G Suite accounts will no longer be able to log into such “less secure apps” if they have not used them before, according to 9to5Google. This is the next step of the internet giant in further securing G Suite accounts.
For the time being, there are two ways of logging an app into a Google Account: with a so-called OAuth token or directly with a username and password. Google considers the latter method to be less secure.
Most apps now support Google’s safe way of accessing an account via an OAuth token. However, there are also older apps that use a user name and password to log in.
For example, older desktop versions of Microsoft Outlook, certain IMAP e-mail clients and calendar apps that are synchronised via CalDAV are considered unsafe apps by Google. Apps such as the included email and calendar apps on Mac and iOS also allow users to log in with a user name and password. For this reason, Google also describes these apps as ‘less secure’.
For old applications that do not offer OAuth to connect to a G Suite account, it is advisable to look for an alternative. Users who have been using Google’s unsafe method of logging in for years will get fifteen months to find a new solution.
For the time being, this only concerns G Suite accounts. Personal Google accounts can continue to use ‘less secure apps’ for the time being.