I ran the CA DADS Plus for CICS utility program DADBCNTL to update APPLID option. The update was successful.
Does the UPDATE parameter only modify the specific option specified like APPLID= or would it change any defaults not listed in the request?
The UPDATE option only modifies-change the specific option for specify in your JCL.
For example, the JCL below will only update the SVC number to 230.
//CNTL EXEC PGM=DADBCNTL,REGION=700K
//STEPLIB DD DSN=DADSPL40.LOADLIB,DISP=SHR
//DADS01 DD DSN=CICS67.DADS.CONTROL,DISP=SHR
//SYSPRINT DD SYSOUT=A,DCB=(LRECL=133,RECFM=FBA,BLKSIZE=133)
//SYSIN DD *
UPDATE
SVC=230
/*
//