Yes. It is documented somewhere, but you want to edited the following file on your IPCCX server:
C:\Program Files\wfavvid\tomcat_appadmin\conf\TIAJ.CFG
Then change the two inputflag variables to N.
# Login Screen Input flag
# Numeric input
# inputflag.login.x=N
# AlphaNumeric input
# inputflag.login.x=A
inputflag.login.id=N
inputflag.login.pwd=N
After you make the change you will need to stop and start the CiscoCRAServletEngine service.
I think I also found this info in the Contact Center forum.
Tom.