You may want to reduce your user count in JIRA if you have exceeded your user count or if you want to change to a lower-tier license to reduce costs. If you only have a subset of your total users using JIRA, you can reduce your user count by simply configuring JIRA to allow fewer users to log in to JIRA. The methods for reducing your user count in JIRA are described below.
The recommended method for reducing your user count in JIRA is to remove users from all groups with the 'JIRA Users' global permission. This is described in the following knowledge base article: Unable to Create Issues Due to Exceeded License.
Alternatively, if you have connected JIRA to an LDAP directory, you may want configure JIRA to synchronise a subset of users from LDAP rather than all users. This is described in the following FAQ: Reduce the number of users synchronised from LDAP to JIRA. However, this can be a complicated procedure and we recommend that you do not use this method unless necessary.