The number of users are parallel to the number of computers QB have installed. Since you have 5 users license, then it can installed and used by 5 users at the same time.

Resolution for '5 user license issue: 'We have a 5 user license for QB Enterprises. Can all 5 users be in the file at once?' available: Yes.

The 5 user license issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the 5 user license issue yourself by looking for a resolution described in the article. If it is a complex 5 user license issue or you are unable to solve the issue, you may contact us by clicking here or by using other 5 user license support options.

For more information about resolving issues related to 5 user license in Quickbooks/QBO or to get support for the issue 'We have a 5 user license for QB Enterprises. Can all 5 users be in the file at once?', click the link below: