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.


Step3. Select the shared ‘unlicensed’ mailbox from the list.


Step4. Press re-set password


Step5. Specify a password.


Step6. Leaving the Office 365 portal in a new tab open up TimeToReplyand 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.