Can I delete the user id created by the WebSphere MQ install process on Windows?
When installing WebSphere MQ on Windows, the install process created a local account MUSR_MQADMIN as the default userid for MQ Services. Is it okay to delete MUSR_MQADMIN?
Yes, you can delete the default user, provided you first create another account, then associate the new user name with MQ Services, as described in the following document: Changing the user name associated with WebSphere MQ Services http://www-01.ibm.com/support/knowledgecenter/SSFKSJ_7.0.1/com.ibm.mq.amqzag.doc/fa12230_.htm?cp=SSFKSJ_7.0.1%2F1-20-2-3-0-1&lang=en
With the release of WMQ v7.1, v7.5, and v8.0, DCOM Config is no longer used. You need to change the userid in the Windows service. The service is named IBM WebSphere MQ(InstallationName), where InstallationName is the name you selected at install time. sometimes running the Prepare Wizard is tricky if you have installed WebSphere MQ using a domain account.
Open Windows Services
right-click on the Installation Name you need to reconfigure select Properties
select Log On tab
change the id and password in the This account section
If using a domain account, the syntax is domain\userid
Save
You will also need to add this account to the Log on as a Service in the User rights assignments
Open the Administrative Tools
select Local security policy
expand Local Policies
select User rights assignments
add the account to the Log on as a service right
You can then rerun the Prepare Wizard for the installation to complete the configuration setup.
Additionally, the MUSR_MQADMIN user is NOT needed if only MQ client is installed, and no MQ services are being used; in this case the MUSR_MQADMIN user can be deleted. The MQ client supportpac installations do NOT create this user, but if the MQ client component is installed from a full the full MQ installation media, the user may be created.