Outlook 2010 (connected to Exchange 365) does not accept any - Microsoft Community
background: we have mfa office 365 enabled throughout organization. some staff members using office 2010. we have used powershell set modern authentication outlook 2016 , skype, because trying avoid using app passwords (because confuse staff). problem: over last week, have started getting reports outlook 2010 users authentication window appears , not accept password, either app password or personal one. disable , re-enable mfa did not resolve issue, , neither did resetting personal pw or creating new app passwords. the thing seems work upgrading them office 2016 which, due increased cost, we're trying avoid if possible. any advice in matter appreciated. hi jeff, mainstream support microsoft outlook 2010 has ended. see more details in https://support.microsoft.com/en-us/lifecycle/search/14864 . welcome community members share insights on case. understand cost increase, better user experi...