How to add a shared mailbox on o365 without a password

There are two options.

Option 1:

Use the BULK ADD option.


Option 2:

Authenticating a shared ‘unlicensed’ mailbox

Step1. Logon to Microsoft Office 365 as your tenant admin to


Step2. Navigate to the ‘Users’ section and click on Active Users. Note: do not go to groups > shared mailboxes as the password option is not available in that section).


Step3. Select the shared ‘unlicensed’ mailbox from the list. Hover over your shared mailbox and click the key icon that appears.

Alternatively, click on your shared mailbox and click “reset password” on the next screen.


Step 4. Press re-set password


Step 5. Specify a password.


Step6. Leaving the Office 365 portal in a new tab open up timetoreply and navigate to the agents page:


Step7. Press Add Agent/Add Another


Step8. Give the mailbox a friendly display name, specify the mailbox email address and Office 365 as the service type, and press send invite.


Step9. Navigate to the agents / mailboxes section under tools


Step10. Press view current authentication link



Step11. Visit this link and sign in as the shared mailbox using the details you created earlier.