You would need to go to your data frame properties. In the general tab there is an option to choose label engine. In there choose Maplex label engine and then rerun feature linked anno tool.
jainamit1508 can you explain me how I create Annotation for Desingnated Point or ATS Route ? For example like this [ATTACH=CONFIG]33406[/ATTACH] Thanks for help!
-Next you need to create a visual specification rule to grab the related information you want to display and add an expression to format it. This is where you would use SQL to make joins to the related table and then use VBScript to format the text so that it looks like the image you posted (we have fonts that are added to your fonts directory that can give you that inverse block look to your number and letters. Take a look at the PLTS Inverse fonts) http://resources.arcgis.com/en/help/main/10.2/index.html#/What_are_visual_specifications/01040000023...