Hello,
We recently introduced a new password password for staff which meant many staff had to pick new passwords. Since doing this, several Outlook desktop users including myself experience and intermittent problem whereby when launching Outlook desktop, you will see various error messages. This is the most common:

If I try to remove and re-create the profile, I also receive errors:

I have noticed that in the system tray, it shows there is no Internet when I can browse the web fine:

Occasionally, a restart will resolve the problem but not very often. Changing proxy settings from 'use a proxy' to 'automatically detect' can sometimes help but not consistently. Something that always works is unplugging the network cable to the wall socket and plugging it into the VOIP handset which removes it from the corporate network and connects it to a completely different broadband circuit. If I do this, it will prompt for the Microsoft 365 username and password which is accepted. I plug the LAN cable back in, do an ipconfig/release ipconfig/renew and Outlook works until the users logs out.
I'm not sure if this is a proxy issue, group policy issue or something else. If I monitor our UTM (Smoothwall) I'm not seeing anything blocked for myself when I have the issue. My own laptop has very few group policies being applied and it still occasionally happens to me.
Any advice would be much appreciated as I've been going round in circles with this for some time.
