Datacom/AD was installed but the Datacom Multi-User-Facility (MUF) log shows this informational message in the startup section:

DB00215I - CA Datacom/DB Version 15.1.02

How to verify what Datacom product is in use?

Release: 15.1
Component: Datacom/AD
Component: Datacom/DB

Here are two options to answer the question:

OPTION 1

In the MUF log, look for the message DB00201I. Here is an example for AD and another for DB from their corresponding MUF logs:

DB00201I - MULTI-USER ENABLED, CXX=cxxname   MUFNAME=admufname   AD   
DB00201I - MULTI-USER ENABLED, CXX=cxxname   MUFNAME=bdmufname   DB 

Ignore the CXXname and MUFname, but look at the last two characters of this line. This will tell you whether the MUF is running as an AD MUF or a DB MUF. This comes from the MUF Startup Option DATACOM AD or DATACOM DB. which can be seen closer to the top of the log, like this one for AD:

DB01900I -  DATACOM     AD 

or this one for DB:

DB01900I -  DATACOM     DB 

OPTION 2

Run a batch DBUTLTY job on each LPAR with SYSIN:

REPORT MEMORY=MVS

You will see the list of MUF NAMEs, the DC (Datacom) column showing AD or DB along with other information.

Here is a snippet of an MVS report run showing two MUFs, one an AD MUF and the other, a DB MUF:

MUF NAME STATUS  REL  JOB NAME  JOB ID  CXX NAME DC  ENBL-MDHMS ...

ADMUF    ENABLED 15.1 ADMUFJOB JOB12345 ADMUF    AD  1011142539 ...
DBMUF    ENABLED 15.1 DBMUFJOB JOB54321 DBMUF    DB  1003154557 ...

Message DB00215I tells the software version...since Datacom/AD is built on top of the Datacom/DB code, it will always show Datacom/DB.