How to permanently prevent Outlook for Mac from switching to the new GUI?

It should not be inevitable - I have tried and tested the new Outlook for Mac and, no matter how much effort is undertaken by my technicians - they are unable to sync my four email accounts and to my calendar and in turn translate this ot my other devices. Please helpll - I am sick and tired of the prompts!!!

In fact, I am so frustrated with this that I would rather revert back to Apple Mail and completely delete Outlook and start again. Surely, the mentality should be rather keep us than have us migrate.

i tried it and lost contacts, mails,

search is not accurate

folders not transfered even after weeks

so i reverted to older version

i don't want the new outlook

Yes, I too would like to make it so that I never get notifications about New Outlook for Mac again.

I have my current Outlook set to my specifications, and it is wonderful. The IMAP works perfectly, as do my files, which I have in a certain order. I'm running an entire charitable organization on my own - no other departments or staff, so my email *is* all of my departments.

I've tried the New Outlook many times, and I just don't want to use it. Period. I don't want to be reminded of it, and I certainly do not want it automatically putting me through this every few weeks!

My reasoning is below:

1. It doesn't recognize my password, and IMAP just doesn't work properly. When I revert back to the classic Outlook, it all works just fine.
2. Mixes up my folders, so they are no longer in the order - some have even disappeared and they have vital info in there! I have these folders set up the way I do for a reason.
3. I cannot add new folders under other folders, the way I can now.
4. It is absolutely non-productive with the new format because I have to spend so much time trying to reorganize things, just to have them change next time I log in.

I don't know if Windows users have these problems, but I can see that this is definitely an issue for Mac Users, so what can be done about this?

Regular security and performance updates are welcome, but please give me the option to never have to switch to New Outlook again.

My sincerest thanks in advance.

Thank you for posting that. Unfortunately that code didn't work for me. It generated a 'command not found' error. I had to use the following syntax:

defaults write com.microsoft.Outlook EnableNewOutlook -integer 0

Maybe this can help others.

I think, based on how long it is taking Microsoft and the limited interested they have shown in our woes about New Outlook, that we'd be better, where we DO have a choice (eg on our personal laptops/pc's) just finding an alternative application.

I have OCD and for me an application which is frequently being changed just for the sake of it , though being termed an 'improvement' by Microsoft, is detrimental to my health.

I'm all for fixing bugs in applications but there is really nothing in 'old' Outlook which I could see needed 'fixing'. I think someone (or a whole development team) just got twitchy about proving they were needed in their job role(s) so decided to come up with 'new outlook'