Stop checking for conciseness in Outlook MacOS App

Hi Matt, 

Thank you for posting your question in the Microsoft Q&A forum. 

I understand how frustrating it can be when you're trying to use plain language like "look into" and the app keeps insisting on changing it to "investigate", especially when you've already tried disabling all the Spelling & Grammar options. 

Based on my experience with New Outlook on macOS, particularly version 16.99.2 (25072714) using a Microsoft 365 Subscription account, I’ve found that the underline suggestions (dotted and double lines) mostly come from Microsoft Editor. The best way to reduce or eliminate these suggestions is to disable the relevant options directly: 

• Turn off "Check grammar as you type" – This removes double underlines (grammar/punctuation). 
• Turn off "Check spelling as you type" – This removes red underlines (spelling). 
• If available, disable Microsoft Editor entirely – This stops style suggestions like conciseness or formality. 

These steps worked well in my Mac environment, but I understand you've already tried disabling everything under Spelling & Grammar and still face the issue. So here’s an optional step that might help: 

• If Outlook is automatically changing quotes, hyphens, or capitalization, and you'd prefer to manage that manually, you can disable AutoCorrect. If this isn’t relevant to your case, feel free to skip it. 
  

Additionally, your issue seems similar to one discussed in this thread: 
PLEASE tell me how to turn off grammar checking in Outlook (Outlook for Mac)! - Microsoft Q&A 

The thread owner found a solution by clicking Language... and ticking the box "Do not check spelling or grammar". 

This appears to stop the suggestions. Unfortunately, according to the thread owner, the feature resets every time you compose a new email, which makes it feel like a band-aid solution rather than a permanent fix. 

From my perspective, the behavior described in that thread strongly suggests this could be a bug or a limitation in the current version of New Outlook for macOS. 

It also helps explain your question:

"When I click 'ignore', can it ignore the issue, instead of ignoring my choice?" 
"When I click 'stop checking for this issue', can it stop checking for this issue, instead of ignoring my choice?" 

This implies that Outlook might not be fully applying your configuration, or it may only temporarily remember your choice for the current email draft. Once you start composing a new email, the settings (or Editor rules) may reset, causing the same suggestions to reappear. 

So, it would be helpful to know: 

• Did this issue start after a recent Outlook update? 
• Or has it always behaved this way? 

If it began after an update, there's a chance it's an unconfirmed bug. In that case, one option you might consider is downgrading Outlook to a previous version where this behavior didn’t occur. 

I hope the information I've shared in this reply gives you some useful insights into the issue you're experiencing. If you have any further questions, feel free to reply here! 

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