service unavailable http error 503 in AX 2012 R3

service unavailable http error 503 while opening the EP Error: service unavailable http error 503 while opening the EP OS: Windows Server 2012AX: AX 2012 R3SQL: SQL 2014SharePoint: SharePoint 2013 User was getting service unavailable http error 503 while opening the EP site. When I checked IIS, i found out that Application pool Stopped for…