Premier retail 2019 5 user license. Everyday we have to reboot server to get back to multi user mode.

I want to ensure this is taken care of, @marcia13.

Usually, the possible reason QuickBooks keeps on switching to single-user mode is because of the network setup. We can download and run the QuickBooks File Doctor. This will fix company files and network issues in QuickBooks Desktop. For the detailed steps, please check this article: QuickBooks File Doctor.

Also, we make sure that your Database Server Manager is properly set up. This is the tool that allows users to access the company data. Please check this article about QuickBooks Database Server Manager and let's perform all the steps provided.

I've also added an article that'll help you learn the task you can perform when switched to single or multi-user mode: Features available and tasks you can perform in single or multi-user mode.

Leave me a comment below if you have other questions. I'll be around to help. Take care!