I am planning to have AlwaysON Availability Group setup between Server 1 and Server 2

Server 1 -->Publisher-->2014 SQL Enterprise edition-->Windows Std 2012 --> Always on Primary Replica

Server 2 -->Publisher(when DR happens)-->2014 SQL Enterprise edition-->Windows Std 2012 --> Secondary  Primary

Server 3 -->Subscriber-->2012 SQL Enterprise edition-->Windows Std 2012 --> NOT involved in Always ON 

Server 4 -->Subscriber-->2012 SQL Standard edition-->Windows Std 2012 --> NOT involved in Always ON 

Server 5(VM)-->Distributor-->2012 Standard edition-->Windows Std 2012-->not involved in Always ON

i know Publisher and subscribers can be mix match of 2014 and 2012

From the above scenarios can i use (VM)SQL2012 std. as Distributor ? while publisher is being SQL 2014 ent.?

please let me know 

Hi, it doesn't appear to be supported

https://msdn.microsoft.com/en-us/library/ee240655(v=sql.120).aspx

'For all types of replication, the Distributor version must be no earlier than the Publisher version.'

Publisher and distributor should be always should be on same  versions.