Office 365 Mailbox Not Showing in Exchange Online [Solved]

Most of the time in large organizations there is a common issue and that is Office 365 mailbox not showing in Exchange Online. If are you also one of those who are facing the same issue, then this is the right place for you. Here you will find the different approaches to resolve this error.

Office 365 is a complete suite to fulfill the current requirements of the organizations. There are several apps under its umbrella such as SharePoint, Teams, OneDrive, and many more. All of the apps are full-fledged with the latest features that improve the business workflow. By using the Office 365 suite, organizations can provide a safe and secure platform for communication to users. But when the user base becomes larger over the period, then there might be the possibility of crashing Outlook and disappearing Office 365 mailboxes. But do not need to worry, because here you will find the topmost solutions to get rid of this error.

Distinct Solution to Resolve Mailboxes Are Not Showing in Exchange Online

We have picked the top 3 solutions to deal with this error. So, let’s start with the solutions to resolve the “Office 365 mailbox disappearing” error.

Solution 1. License Assignment

Sometimes this error might persist because of not assigning the license to the users. For managing a mailbox in Office 365, every user needs a valid license. The adding and removing of the licenses to the users is handled by the Office 365 administrators. To do so, below are the steps that should be followed.

• Step 1. Go to Office 365 Admin Center > Users > Active Users.

• Step 2. Now move to the Licenses and Apps. Choose the location value.

• Step 3. Assign the license that has Exchange Online plans Plan 1 or Plan 2. Finally hit on Save Changes.

• Step 4. Now sign out and sign in again with the required credentials.

[ Note:- Office 365 takes 10 to 15 minutes to refresh the licensing.]

Solution 2. Identify the Exchange Online Service Health

If the issue of Office 365 mailbox not showing in Exchange Online has not been resolved yet. Then check the service health of the Exchange server. Follow the below steps to verify the service health of the Exchange server.

• Step 1. Log in to the Microsoft 365 Admin Center.

• Step 2. From the left side pane, click on the Health.

• Step 3. Now choose Service Health.

• Step 4. Click on the Advisories link to calculate the current issues with the file.

Solution 3. Removal of Unwanted Roles from the User

Office 365 mailboxes are not showing, which may be due to multiple assigned roles to the user. Sometimes, a user has multiple roles which are of no use. So, remove all the unnecessary assigned roles from the user. It can be achieved by the admin. The admin has the right to assign and remove the roles. Below are the steps to remove the roles from the user.

• Step 1. Sign in to the Office 365 Admin Center.

• Step 2. Go to Users > Active Users.

• Step 3. Now under the Roles, click on the Manage Roles option.

• Step 4. Take a look at all the assigned roles to the users.

• Step 5. Add or remove the roles as per requirements and hit the Save Changes option at the end.

If the mailboxes are having the same issues then you should Export Office 365 Mailbox to PST to save their data locally. After that, you can also initiate working offline with Office 365 easily.

Conclusion

When the users are increased in Office 365, then sometimes you need to face the Office 365 mailbox not showing in Exchange Online issue. Due to this, users are not able to send or receive emails. Therefore, in this write-up, we have explained all the possible solutions in a detailed manner. Now, you can pick the right one for you to resolve this error.