Sage has begun to contact customers via their online knowledgebase and alert them about an upcoming change. In order for your Sage 100 accounting software to continue contacting the Sage licensing servers you must be on a supported version of Sage 100.
From the Sage KB 116278
In the summer of 2023, Sage will be making changes to your license verification to utilize a current Transport Layer Security (TLS) protocol recommended by third-party standards organizations. This measure is required as older versions of TLS do not meet current security standards and can pose a security risk. If you have a subscription business care plan and are not on a Supported Version of Sage 100, your software will convert to read-only mode.
What does this mean?:
Sage will be updating their internal licensing servers to use TLS 1.2. This is a a widely adopted security protocol designed to facilitate privacy and data security for communications over the Internet.
Previous versions ( prior to Sage 100 2019 ) utilize only older TLS 1.0 or 1.1. Starting in the summer of 2023 you will need to be on a supported version of Sage 100 which offers TLS 1.2 or your ability to maintain a license is jeopardized as Sage states that those who are not on current versions will find their system converted to a read-only mode.
Our recommendation is upgrade to Sage 100 2021.4+ or 2022.1+ for maximum compatibility.
Using Microsoft Exchange with Sage 100 and Paperless Office ( KB 116280)
Sage 100 product licensing and Transport Layer Security ( KB 116278 )