This just suddenly happened. I have no issues before for a couple of months. Then suddenly, this error came up.
Here is my osticket:
tigduwa Check this post out, you will need to setup https://howtohelpdesk.com/how-to-setup-oauth-on-osticket-using-microsoft-365/
ramrajone Thank you for the guide. This helped a lot. In addition, I found out that the network admin in our company have put an IP restrictions on the helpdesk the reason for the error. After removing the IP restrictions, all works normally.
