Using a security defined user id that contains the pound sign #. For example: MTC#.
The ESM started task (ESMPROC) does not stay up. The log shows this error:
10:39:43.634 [main] INFO com.ca.sslsocket.CASSLImplementation - keyStoreFile name is safkeyring://MTC%23/RINGMTCSS
10:39:43.637 [main] ERROR org.apache.coyote.http11.Http11NioProtocol - Failed to start end point associated with ProtocolHandler ["h
java.io.IOException: R_datalib (IRRSDL00) error: profile for ring not found (8, 8, 84)
The pound sign is being translated to "%23"
In this example, the safkeyring in the CAW0OPTV(ESMENV) file is defined as follows:
Release : 15.0
Component : EXTERNAL MICROSERVICE (ESM)
Security: CA TOP SECRET for z/OS