How to Share Email Folders in Outlook (PC Desktop)
To allow another person access to specific folders in your Outlook inbox, you must grant permission at three levels:
Mailbox (account) level
Inbox level
Specific folder level
You can do this using either the Outlook desktop application or Outlook on the web at outlook.office.com.
Step 1. Mailbox (Account) Level
Open Outlook.
At your email name, right-click your email address (the top-level item).
Select “Sharing Permissions” (Windows) or “Account Settings” (Mac).
Click the “Add” (+) button.
Search for and select the person(s) you want to share with. Add multiple people if you want to share folders with multiple people.
Leave Permission Level at “None”, check “Folder visible.”
Click OK.
Step 2. Inbox Level
Right-click the “Inbox” in your email account and select “Sharing Permissions.”
Click the “Add” (+) button.
Search for and select the person(s) you want to share with. Add multiple people if you want to share folders with multiple people.
Leave Permission Level at “None”, check “Folder visible.”
Click OK.
Step 3. Inbox Level
Right-click the individual folder you want to share and select “Sharing Permissions.”
Click the “Add” (+) button.
Search for and select the person(s) you want to share with. Add multiple people if you want to share this individual folder with multiple people.
At Permission Level use the dropdown to select “Editor”. “Folder visible” will auto select.
Click OK.
Repeat this process for each folder you wish to share.
How to Access Email Folders in Outlook That Have Been Shared With You