Use the mqsireloadsecurity command to force the immediate expiry of some or all the entries in the security cache.
Entries in the security cache are valid for a specified length of time, after which the entries are marked as ‘expired'. When an entry is marked as expired, it must be reauthenticated with the security provider before it can be reused, and its expiry time must be reset. If reauthentication fails, the entry remains marked as expired. All entries in the security cache marked as expired are removed when the next sweep of the cache is performed.
Use the mqsichangeproperties command to set the time for which entries in the cache are valid, and also the value for the sweep of the security cache. When the entries in the security cache have expired, you must reauthenticate them.