Using Classic Outlook on Windows for personal email, calendar, and contact management
In classic Outlook, you can share only your calendar without allowing access to your email.
Open Calendar, right-click your calendar under My Calendars, and select Sharing Permissions or Properties > Permissions. Add your husband’s email address and assign a view-only permission level, such as Free/Busy time, Limited details, or Full details.
Your husband can then follow the same steps in his Outlook to share his calendar with you. Avoid adding each other under Delegate Access, as that is not required for simply viewing a calendar.
Calendar permissions apply only to the selected calendar folder, so neither of you will be able to read the other person’s email.
Hope this helps. Please feel free to give me an update!