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

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.

The option to never switch was posted in August on page three of this thread. I have not seen it in a couple of months on multiple systems after following the instructions.

Quit Outlook, open Terminal. Copy the following line, paste it into the Terminal window, and press enter.

defaults write com.microsoft.Outlook EnableNewOutlook -int 0

You'll be taken back to the standard prompt, but once you launch Outlook again, you should no longer see the 'New Outlook button and won't be prompted to switch.

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 have not found a way to revert back in any of the dropdowns. Very frustrating!

look at the code earlier in this post. worked for me.

I agree that the old Outlook didn't need fixing. It worked just fine. As it appears that we won't get any helpful answers from Microsoft, can anyone suggest an alternate email program? Has the OS Mail program improved? I had issues with it a few years ago and switched to Outlook but I am seriously considering abandoning it and switching back to Mail.