Dear EAHH
Thank you for reaching out to the Microsoft Community. We are happy to assist you.
I apologize for any inconvenience caused by setting different working hours. I have reviewed the scenario in Microsoft® Outlook® for Microsoft 365 MSO (Version 2409 Build 16.0.18025.20030) 64-bit, in the current channel. You can set different working hours for each day of the week in Outlook.
Navigation: File > Options > Calendar > Work hours and location
This feature is also available in the web version of Outlook for Microsoft 365.
To set work hours in Outlook:
- Sign in to Outlook Mail - Outlook (office365.com)
- Go to Settings > Calendar > Work hours and location.
- Select the checkboxes for the days you want to set different working hours.
- Use the dropdowns to select your start and end times for each day.
- Click Save to apply the changes.

If you are experiencing any difficulties, please share the following details:
- Could you please confirm which version of Outlook are you currently using? For obtaining your Outlook version and product details:
Share your Outlook version and product details:
- For New Outlook: Go to Settings > General > About Outlook.
- For Classic Outlook: Navigate to File > Office Account.
Take a screenshot of the entire page (excluding personal information) and share it with us.
Reference: What version of Outlook do I have?
- Please provide details regarding your specific Office 365 subscription. Are you using Microsoft 365 Business Basic, Standard, Enterprise, or Education? Alternatively, is it Microsoft 365 Family, Personal, Office 365 Home and Business, Office 365 Home and Student, or a Personal Outlook.com subscription?
Sharing the information requested above will help us provide more accurate assistance.
Thank you for your cooperation and understanding. Please do not hesitate to post your queries in the Microsoft Community, and we will always do our best to assist you!
Sincerely
Feroz Mahmud | Microsoft Community Moderator