There are no breaking changes in this release. However, if you use the Exchange connector with basic authentication, you may want to plan the upgrade process towards OAuth2 and/or multi factor authentication on Azure.
2020.2.0 Upgrade steps
Update the Exchange connector
Microsoft announced the end-of-life of basic authentication for Exchange Web Services, on which the Dime.Scheduler Exchange Connector relies. There's still time to prepare for this change (October 13, 2020).