Office 365 Shared Mailbox not Showing in Outlook

Aftab Alam
Aftab Alam | Updated On - 26 Jul 2022 |

Read time 7 minutes

“I migrated my on-premises mailbox data to Microsoft 365 using the hybrid method. In Exchange Online, I created a shared mailbox and gave full permission to my account. But I cannot see this shared mailbox in Outlook on my PC.”- An Exchange Online User.

In recent years, the migration from the on-premises Exchange environment to Office 365 or cloud environment has become a trend, and many organizations are migrating their data completely to the Cloud. Generally, the transfer is quite smooth, and there are no significant hurdles that interrupt the process and stop it. After the post-migration tasks, Office 365 data will be accessible in MS Outlook. But sometimes it happens that the end-user is not able to view the data in the local Outlook application.

Shared Mailbox is Not Visible in Outlook

Shared Mailboxes are a great way to give multiple users access to the same mailbox. However, sometimes Shared Mailboxes are not visible in Outlook. This can be caused by several different factors. One possibility is that the Shared Mailbox has not been properly configured. Another possibility is that the user does not have sufficient permissions to access the Shared Mailbox. If you are having difficulty accessing a Shared Mailbox, check with your administrator to make sure that the Shared Mailbox is properly configured and that you have the correct permissions. With a little troubleshooting, you should be able to get your Shared Mailbox to show up in Outlook.

Remove the Error – ‘The Folder You Selected is Not Available’

Usually, the Shared mailbox should come up instantly in the user’s Outlook profile. But if it is not showing, then the user may get an error message – ‘The folder you selected is not available.The folder you selected is not available

In such a case, you can manually add the mailbox to the account. Just follow the procedure:

  1. Start the Outlook and click the File menu. Then select Account Settings >> Account Settings.
    select Account Settings
  2. Select the account (with the shared mailbox). Then click Change.
    Select the account
  3. Click More Settings.
    More Settings
  4. In the Advanced tab, click the Add button.
    Add button
  5. Provide a new name to the mailbox. Then click OK and Apply.
    Provide a new name to the mailbox

After completing the process, you will be able to see the Shared mailbox in your Outlook profile.

If the profile does not show even after manually adding it, then you should go for troubleshooting the Outlook and see its results.

Enable the Troubleshooting Logging

  1. Click File and then select Options.
    select Options
  2. Go to the Advanced tab and check the option Enable Troubleshooting logging.
    Go to Advanced tab
  3. Restart the Outlook and go to the temporary folder (%temp%). Here, check the recent logs which may show possible errors related to the shared mailbox. Then, take necessary action according to the given error.

Disable Automapping

Automapping is a feature in Office 365 that automatically maps the shared mailbox to your Outlook account. But the Outlook stores all the data in the OST file. So, the data from the shared mailbox increases the data very much, and it can grow more than the optimal size of 50 GB. If the size of the OST file increases, then it may start giving problems and stop taking data from the shared mailbox. So, it is better to disable automapping and add the shared mailbox as a separate profile.

Here is the complete process to disable the automapping in Office 365.

  1. Connect with PowerShell
    1. Open Windows PowerShell and run the command:
      $Credential = Get-Credential

      It will ask you to input your Office 365 credentials. Input them and click OK.

    2. Run the command to connect with Exchange Online (Office 365);
      $ExchangeSession = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri “” -Credential $credential -Authentication “Basic” -AllowRedirection
    3. Import the Exchange Online session:
      Import-PSSession $ExchangeSession
  2. Remove permission for the shared mailbox.
    Run the command:

    Remove-MailboxPermission -Identity -User -AccessRights FullAccess

    The command will remove the access rights of the information shared mailbox to the user Michael.

  3. Delete the shared mailbox.
    1. Follow File >> Account Settings >> Account Settings.
    2. Select the account, and click the Change option.
    3. Click the button More Settings and go to the Advanced tab.
    4. Select the shared mailbox and click Remove.
  4. Reinstate the full access permission.
    Run the following command –

    Add-MailboxPermission -Identity -User -AccessRights FullAccess -AutoMapping:$false

    The AutoMapping parameter will disable the automatic mapping.

  5. Add the Shared Mailbox as a new mailbox.
    Add the shared mailbox as a normal account in Outlook and Outlook will create a new data file (OST) for it.

Limitations of the Manual Methods

Simple manual approaches to fix the issue exist, but not everyone is capable of performing them. In addition, these methods also have some limitations. These limitations are outlined below.

  • Due to cloud storage’s inherent vulnerability, there is always a high risk of data theft.
  • They can fix the Office 365 shared mailbox disappearing from Outlook, but these solutions do not prevent unauthorized access to your valuable data.
  • There is no guarantee that these methods will be effective every time. They might not work in some cases.
  • Not everyone can use them. They are complicated for some users.

After using all these methods, you should be able to see your shared mailbox content in Outlook. Once you are able to see your shared mailbox in Outlook, you can access and use it to send and receive messages. But, if you do not see the shared mailbox, it is possible that the migration of the shared mailbox failed due to some reason. Then you should use a professional migrator tool that does not have any shortcomings and completes the migration process efficiently.

This tool is an efficient and reliable software to migrate from on-premises Exchange, PST, and public folder servers to Office 365. The Kernel tool has various features which makes it an attractive choice for migrating to Office 365.

  • The Kernel tool can migrate emails, contacts, calendars, tasks, and notes from on-premises Exchange Server to Office 365.
  • The Kernel tool can also migrate public folders to Office 365.
  • The Kernel tool supports incremental as well as batch migration which means that users can migrate a small number of mailboxes first and then migrate the remaining mailboxes in batches.

Consequently, this utility is a feature-rich software which makes it a good choice for migrating to Office 365.


Are you having difficulty locating your Office 365 Shared Mailbox in Outlook? This can be a common issue for users who have transitioned to the new Office 365 platform. In this article, we have provided some troubleshooting steps to help you locate and access your Shared Mailbox. Finally, if all else fails, you can try the above-mentioned tool.

Kernel Office 365 Migration is a unique migrator tool that specializes in the migration between Exchange and Office 365 or vice-e-versa. It provides an option to migrate Office 365 shared mailbox to Office 365 group. You can also apply appropriate filters to the shared mailbox to migrate its content selectively to Office 365.

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