Just to provide a heads up to the Community, I received this message from SFDC.

As an admin of a Salesforce org that may use the TLS 1.0 encryption protocol with Salesforce, we want to remind you that Salesforce is disabling TLS 1.0 for all sandbox instances on June 25, 2016 at 9:30 AM PDT (16:30 UTC). Action is required prior to this date to prevent any disruption to your sandbox instance.

To ensure that you are prepared for the TLS 1.0 disablement on June 25th, we invite you to join our upcoming webinar. In this webinar, our Infrastructure Security team will do the following:

Explain how this change will impact Salesforce products, services and developer tools
Highlight resources and best practices to help you prepare your Salesforce org and your users for this change.

Join any of our webinar sessions:

Wednesday, June 15, 2016
4:00pm US Pacific Time

Thursday, June 16, 2016
7:00am US Pacific Time

Register here to select your preferred time.

NOTE: Please reserve your webinar spot early as space is limited. If you are unable to attend the webinar, or if registration is full, a recording will be made available here on June 21, 2016.

How can I get more information?

Review the Salesforce disabling TLS 1.0 article for detailed information and best practices to help you prepare for this change.

For additional questions, open a case with Support via the Help & Training portal.