Azure Data Share service has been generally available since November 2019. Beginning August 1, 2021, you will no longer be able to access the preview API versions (2018-11-01-preview, 2020-06-01-preview). Please upgrade to the latest API and Nuget versions.
This only impacts users of Data Share REST API or SDK. If you are using Data Share service through Azure portal, Azure CLI or Azure PowerShell, you are not impacted.