material master replication
Initially we uploaded all the material master records then later we created some new material master records and made some changes to the already replicated MMR.
The newly created MMR whether we need to upload them manually each time when ever we create new MMR in ECC( i am not able to see new MMR in SRM) and changes will automatically will get replicated?
Yes, if you configure delta replication the changes to materials and new materials should automatically come over to SRM.
Check OSS note 720819 for settings.