Dear respected leocarioca,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
I’m sorry you’re having a problem but based on your description we can work together to resolve it.
For the situation you encountered, we deeply understand the inconvenience caused and apologize for it.
As per your description, yes, the latest Microsoft 365 version 16.93doesn't support on your Mac OS Monterey 12.7.6.
You may need to install/download old version of Office 365 that work on your Mac OS Monterey 12.7.6. You can download the installer version 16.88 from this link: Office suite (with Teams)
Also, you can download the installer version 16.88 from this page: Update history for Office for Mac as well.
Summary:
Since the latest Microsoft 365 version 16.90 doesn't support on your Mac OS Monterey 12.7.6.First, you'd need to delete the wrong version:
For your reference: Uninstall Office for Mac - Microsoft Support(if there is install any).
Then for Mac OS Monterey 12.7.6., you can download 16.88 compatible version of Office:
Office suite (with Teams) (with Teams)
Office suite (without Teams) (without Teams)
Note: Also, use the Help menu and choose Check for Updates. Under Automatic update, clear the check box to keep Office automatically updated, as version 16.88 is the final version for Mac OS Monterey 12.7.6
Please understand that our initial reply may not always immediately resolve the issue. However, with your help and more detailed information, we can work together to find a solution.
I'm sorry and I apologize for that.
Appreciate your patience and understanding and thank you for your time and cooperation.
Sincerely,
Waqas Muhammad