This September, Visual Studio App Center delivered same-day build support for Xcode 10. As our community builds fewer than 1 percent of apps with older versions of Xcode 8, we will focus on supporting Xcode 8.3.3 and higher. Effective November 28, 2018, we are ending support for older versions of Xcode, including 8.0, 8.1, 8.2, 8.2.1, 8.3.1 and 8.3.2.
We recommend you update your build configuration to Xcode 8.3.3 or higher prior to November 28, 2018. After this date, any app configured with a deprecated version of Xcode will automatically be bumped to Xcode 8.3.3. Please reach out to support via the blue bubble in App Center with any concerns.