VS2017 has a feature called Lightweight Solution Load (LSL). In VS2017 15.3, Visual C++ projects started participating in LSL. Projects listed as (deferred) are ones that are lightweight loaded -- they show up in solution explorer but load of them has been deferred. The 'deferred' text should go away once a project is no longer lightweight loaded. Expanding/opening a project node in solution explorer (assuming it is closed) will cause load of the project. Some VA features are not enabled in deferred projects. For example, rename file is not supported since the project isn't actually loaded (and the project must be modified when you rename a file). Improved support for LSL is coming in the next few releases of VA.