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There will be a transition phase to make sure no HEIs are left behind with regards to ensuring their students can access the OLA. Accordingly, until From the beginning of 2021 students can also access the OLA platform with a Google login; from that point onwards a solution for ECHE holders who are not federated in eduGAIN will be has been made available. The updated OLA platform shares the MyAcademicID based authentication solution with the updated Erasmus+ App. There are also available authentication options with eIDAS and also Login with Google
Please see more information here.