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New site mailbox has an incorrect email address

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PROBLEM

Consider the following scenario in Office 365:

  • You have the following domains:
    Contoso.onmicrosoft.com
    Contoso.com
    AUContoso.com
    UKContoso.com
  • AUContoso.com and UKContoso.com are accepted domains that were added to the Hybrid Configuration wizard. Contoso.com is federated and can't be set as the default accepted domain in Office 365. Therefore, contoso.onmicrosoft.com shows as the default domain.
In this scenario, a new site mailbox is assigned an incorrect email address.

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SOLUTION

To resolve this problem, change the email address of the site mailbox. To do this, follow these steps:

  1. Connect to Exchange Online by using remote PowerShell. For more information, see Connect to Exchange Online using remote PowerShell.
  2. Run the following command:
    Set-Mailbox -Identity MySiteMailbox1 -EmailAddresses SMTP:MySiteMailbox1@contoso.com, smtp:MySiteMailbox1@aucontoso.com -EmailAddressPolicyEnabled:$False

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MORE INFORMATION

Still need help? Go to Microsoft Community.

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Keywords: o15, o365e, o365m, o365022013, exo, tsg, vkbportal231, o365, o365a, vkbportal339, o365smb, uacrossref, pscommand, kb, yespartner

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Article Info
Article ID : 3172620
Revision : 2
Created on : 8/24/2020
Published on : 8/24/2020
Exists online : False
Views : 347