https://support.microsoft.com/en-au/topic/cumulative-update-44-for-microsoft-dynamics-nav-2013-r2-build-48616-fc13ef17-ec41-861c-0ad8-74442864179a
Cumulative Update 44 for Microsoft Dynamics NAV 2013 R2 (Build 48616) - Microsoft Support
Describes that cumulative update 44 for Microsoft Dynamics NAV 2013 R2 is available.
microsoft dynamics navcumulative update