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  1. #1
    Junior Member
    Join Date
    Jan 2019
    Breslau, ON
    Rep Power

    MS TLS1.0 and 1.1 deprecation affecting Office 365

    Does anyone know if Microsoft finally deprecated TLS 1.0 and TLS 1.1 on the weekend? They had this scheduled for October 2020, but it was delayed due to pandemic. I had 15 calls this morning for O365 SMTP not working on our Kyocera MFPs. Setup O365 with STARTTLS on port 587, same as they always have been, but they start getting x4803, which is an SSL error. I remove SSL3.0/TLS1.0 and TLS1.1 from both Serverside and Clientside settings of Network Security, and scan to email starts working again. I leave TLS 1.2 enabled, as well as SHA1 and SHA2 as they are needed for KFS. Has anyone else come across this situation starting only this week?

  2. #2
    Service Manager 1,000+ Posts rthonpm's Avatar
    Join Date
    Aug 2007
    Rep Power

    Re: MS TLS1.0 and 1.1 deprecation affecting Office 365

    Support for TLS 1.0, 1.1, and 3DES ciphers in Microsoft 365 ends 31 January, 2022.

    At this point there's not much reason to keep anything older than TLS 1.2 enabled on any device as it just opens the possibility of downgrade attacks.

    Sent from my BlackBerry using Tapatalk

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