Install Database Create Mirror Database Page
This is preliminary documentation and is subject to change. Blank topics are included as placeholders.
If you chose not to install the SQL Server mirror databases during the Publish process, you install them using Install Database from a right click on any node in Topology Builder. You select the mirror store to install. Click Settings to define any advanced settings.
See also
Deploy SQL mirroring for Back End Server high availability in Skype for Business Server 2015