Sage 100 offers an option to email various documents from within the accounting software. Doing so requires use of Paperless Office functionality which relies on several internet protocols to deliver the document from your Sage 100 system to an email server.
One of those protocols is TLS ( Transport Layer Security ). This is the successor to SSL ( Secure Sockets Layer ) and provides for a secure connection over the Internet and to your email server.
The current TLS version is 1.3 with prior versions having been deprecated ( discontinued ) by many email services.
Microsoft has indicated their Office 365 / Outlook email service will drop support for TLS 1.0 and 1.1 in June 2020. At this point anyone looking to connect to the Microsoft email server would need to be using TLS 1.2 or higher.
To provide the best-in-class encryption to our customers, Microsoft plans to discontinue the support for Transport Layer Security (TLS) versions 1.0 and 1.1 in Office 365 and Office 365 GCC as of June 2020.
We understand that the security of your data is important, and we’re committed to transparency about changes that may affect your use of the TLS service.
The Microsoft TLS 1.0 implementation has no known security vulnerabilities. But because of the potential for future protocol downgrade attacks and other TLS vulnerabilities, we are discontinuing support for TLS 1.0 and 1.1 in Microsoft Office 365 and Office 365 GCC.
If you have received email from Microsoft advising that TLS 1.0 and 1.1 support will be stopping soon then your best course of action is to upgrade to Sage 100 2019 or Sage 100cloud 2019 which fully supports TLS 1.2 and does not require a patch.
Users who cannot move to Sage 100 2019 can obtain a patch for version 2018. Sage indicates that they will not provide a patch for any version earlier than 2018.