I am having a problem when connecting to my employer's office 365 server. I'm getting an error that says the current command did not succeed. User is authenticated but not connected. If I connect to the same account in Outlook, it works as it should. Everything was working fine until about a month ago. I had not made any changes to the configuration, except for possibly a version upgrade. I am getting same error on all computers running Thunderbird. Two are Windows machines, one is a Linux machine. I am currently on Thunderbird 128.5.2ESR. I have seen solutions on Google, and I have tried deleting the account, recreating it and changing the IPV6 DNS setting in config editor to true. Has my employer changed something that is not going to let me in? I really hope not, as I cannot stand Outlook. Even more so with the new Outlook. Thanks much for your help and advice.

Guy