Hi
@ZCollins-SFT
Based on your description, I can assume a few things and also suggest a few points to check
a) Your extensions have Autoswitch enabled, under their Forwarding Rules (this is necessary for them to go to DND automatically)
View attachment 27224
b) You might also have office hours override under each specific extension (under the Configure button) and this will ignore your Global Office Hours
View attachment 27227
c) You have Global Office Hours setup, but they are not set up correctly (ie. the opening hours are not at the correct time). Found under Settings
d) Possibly, the system has the wrong time, and even though you might have all the above setup correctly, it does not make the extensions available
e) If you are using custom / outdated phone templates, they phones are not switching back to available when the PBX tells them to.
I think this should be enough to get you started, please investigate the points above and let us know if this helps you or if you find anything additional you want to share
PS: You are on V16 - I very highly recommend to upgrade to V18 as soon as possible as your current version is close to end of life. Read this blog post to get informed about what will change:
https://www.3cx.com/blog/news/v16-web-meeting-eol/