Update README.md

Author: rkesarwa

README.md

@@ -108,9 +108,9 @@ Meta Key is a key generated by an entity that can be used to authenticate on beh
 
 SOAP PHP SDK supports meta key by default. Additional detail regarding cybs.ini changes.
 
-merchantID=\<Refers-to-portfolio-mid> <br>
-transaction_key=\<Soap-password-generated-for-meta-key><br>
-Send merchantID in request for nvl/xml/sales and followOnCapture request.
+merchantID=\<Refers to portfolio or account MID> <br>
+transaction_key=\<Soap password generated for meta key><br>
+Send transacting merchantID in the sample request.
 
 ## Tests