[z/OS]

Specifying the key repository location for a queue manager on z/OS

To specify the location of your queue manager's key ring, use the ALTER QMGR MQSC command to set your queue manager's key repository attribute.

For example: 

ALTER QMGR SSLKEYR(CSQ1RING)
if the key ring is owned by the channel initiator address space, or: 

ALTER QMGR SSLKEYR(userid1/CSQ1RING)
if it is a shared key ring, where userid1 is the user ID that owns the key ring.