Hi All,

Can someone help on below issue.

The issue is with event receiver which fires in Dev environment (Single server - SP2010) while it Does not fire in multiple server ( 2 WFE, 2 App , 1 DB server - SP2010) 

I have event receiver on custom list (Added/Updated) .  When user edit list form then we are showing values from term store on edit form and event receiver does not fire .

Added event receiver fires in both environments while Updated event receiver does not fire in Prod environment.

Please advise.

can you ensure that the same updated dll is installed on both the app server, at-times is happen that while deploying, the solution is not updated on all the server. 

You can verify this from central admin for solution deployment the server it has been deployed.

Or If you have access on server can you check by installing the dll in gac manually do an IIS reset and verify.

Thanks Pankaj ,  I will get it checked.

Do we need to do extra setting in any configuration file in case of  multiple server environment because its working fine in Dev single server environment.