Cumulative Updates 1 and 2 for Microsoft Dynamics NAV 2015 has bee released already
CU1 resolves a lot of small problems in the platform area. Also, this CU has application improvements in almost all functional area.
You can find and download Cumulative Update1 here. This CU1 is named as Build 38457
CU2 includes all application (Administration, Finance, Inventory, Manufacturing, Marketing, Purchase, Sales, Service and Warehouse) and platform hotfixes and regulatory features that have been for Microsoft Dynamics NAV 2015. It has a lot hotfixes for following localisations: Germany, Denmark, Spanish, Finland, France, Italy, North America, Netherlands, Norway, Russia, Sweden, United Kingdom,
You can download Cumulative Update 2 for Microsoft Dynamics NAV 2015 from here. This CU2 is named as Build 38798.