Our systems are running DM10.2CU12 & SRM 1.2.28

We would ideally like to perform a dual upgrade to 10.2CU12>10.3CU21>10.4CU13.

We have today upgraded our staging server to 10.3CU21, and it is performing okay.  Before we upgrade again to 10.4CU13 do we need to upgrade the SRM package, or will the existing version be compatible?

I assume we will need to migrate the profiles and resources data to an indexing database and update the configuration. See migrating profiles data and migrating resource data?