QB Issue Resolution:

To avoid this, I’d recommend logging in to QuickBooks using another computer so you’ll all be able to use QuickBooks at the same time.

When you don’t use a server hosting, you need to turn on the multi-user mode to let other device access the company file and QuickBooks Desktop (QBDT). Here are a series of articles that can help you use  QBDT in a multi-user environment:

  1. Download and install QuickBooks Desktop
  2. Set up folder permissions to share company files
  3. Configure Firewall and Internet security settings for QuickBooks Desktop
  4. Set up the QuickBooks Database Server Manager and scan your file
  5. Add Windows admin rights to allow configuration of multi user access
  6. Map a network drive (optional)
  7. Open a company file that is located on a remote computer

For the detailed steps, you can check out this article: Set up Multi-User Network.

To know more about Multi-user setup and some troubleshooting steps in case you’ll be encountering multi-user issue, you can refer to these articles below:

Resolution for Issue 'Quickbooks desktop: How can I avoid booting off the Admin, when I as a multi-user try to log into QuickBooks at the same time?' available: Yes (Solved).
Source: Intuit Community forum.

Quickbooks desktop: How can I avoid booting off the Admin, when I as a multi-user try to log into QuickBooks at the same time?: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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