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Office 365 sent this email to clients and published through the Admin Portal Message Center about the imminent switch off of TLS 1.0/1.1.

 
Prevent/Fix: Your organization is still using TLS1.0 or TLS1.1 to connect to Exchange Online
MC186018
Prevent or Fix Issues
Published On : 17 July 2019
Action required by

As announced previously (most recently MC152261 in October 2018), TLS1.0 and TLS1.1 are no longer supported in Office 365 as of October 2018. Customers should no longer be using TLS1.0 and TLS1.1 to connect to Exchange Online. While no date has been set, we are working towards setting a date for their removal from the service. If either were found to be compromised before then, we would have no choice but to expedite their removal from Exchange Online.

 

 

How does this affect me?

You are receiving this message because our reporting indicates that your organization is still using one of those unsupported TLS versions to connect to Exchange Online. Mailboxes are still connecting using SMTP Auth client submission via smtp.office365.com with TLS1.0 or TLS1.1. You can find out which mailboxes by using the SMTP Auth Clients report described in the blog post linked to below.

 

They published a blog to help users find the devices using TLS 1.0 - https://techcommunity.microsoft.com/t5/Exchange-Team-Blog/Investigating-TLS-usage-for-SMTP-in-Exchan... and of course, as we've all discovered its all our HP multifunction devices that are fault. Still no updated firmware with TLS 1.2 support so it looks like nobody will be able to use the scan to email functionality on HP devices with Office 365 mailboxes very soon.

 

Great to see a complete lack of any public statement from HP about this - they are clearly aware that its an issue and all they can do is get their tech agents to provide some basic reconfiguration of email settings which doesn't fix the issue - purely a smokescreen for the lack of TLS 1.2 support. Whats strange is that they're currently selling devices (M377dw, M477fnw, etc) that don't support TLS 1.2, so its not a legacy printer issue.

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There has been a further post from Microsoft on 24th July, looks like HP have got less than a year to fix everyone's multifunction devices and allow them to send through Office 365 mailboxes (I suspect that a lot of other mail service providers will block TLS 1.0/1.1 connections too due to the security risk) -


Office 365 will retire TLS 1.0 and 1.1 starting June 1st, 2020 in Worldwide and GCC Environments
 
As previously communicated (MC124104 in Oct 2017, MC126199 in Dec 2017 and MC128929 in Feb 2018), we are moving all of our online services to Transport Layer Security (TLS) 1.2+ to provide best-in-class encryption, and to ensure our service is more secure by default.
Keeping on track with this promise – Office 365 will be retiring TLS 1.0 and 1.1 starting June 1, 2020.
[How does this impact me?]
Starting June 1, 2020, Office 365 will begin retiring TLS 1.0 and 1.1. This means that all connections to Office 365 using the protocols TLS 1.0 and TLS 1.1 will not work.
[What should I do to prepare for this change?]
Update or replace clients and devices that rely on TLS 1.0 and 1.1 to connect to Office 365, prior to June 1, 2020.
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I was wondering why all our HP devices stopped delivering mails since we migrated to Exchange 2019. We have way older devices that were patched for this years ago.

† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the <a href="https://www8.hp.com/us/en/terms-of-use.html" class="udrlinesmall">Terms of Use</a> and <a href="/t5/custom/page/page-id/hp.rulespage" class="udrlinesmall"> Rules of Participation</a>.