Office 365: Correcting users who have had a mailbox in the cloud and on-premises…

In some previous blog posts I have outlined conditions where users may have inadvertently had a mailbox both on premises and in the cloud at the same time.  The following links outline these scenarios and how to attempt to proactively identity users that may fall in this condition. https://blogs.technet.microsoft.com/timmcmic/2018/04/10/office-365-detecting-and-preventing-duplicate-mailboxes-between-on-premises-and-exchange-online/ https://blogs.technet.microsoft.com/timmcmic/2017/09/10/office-365-users-have-both-a-cloud-and-on-premises-mailbox/ https://blogs.technet.microsoft.com/timmcmic/2018/04/09/office-365-licensing-mail-users-results-in-mailbox-objects/ With an understanding of…

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Office 365: Exchange Migrations and the data migrated information…

In Office 365 migration batches are the preferred method of establishing mailbox migrations to Office 365.  When a migration batch is established the users included in the batch are represented as migration users within the service.  Within the context of each migration user is where we track the migration process.  One of the data points…

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Office 365: The mystery of mobile phone…

In the last few weeks I have worked several escalations from customers inquiring about inconsistencies with the mobile phone attribute.  In almost all cases inconsistencies were noticed in the Exchange Online contact card where mobile phone listed did not match on premises. When directory synchronization is enabled on an Office 365 tenant a set of…

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Office 365: Unable to locate an Azure Active Directory user for an Exchange Online Mailbox

In order for an Exchange Online mailbox to exist in Office 365 it must be attached to an Azure Active Directory object.  In Exchange Online we record the object ID for the Azure Active Directory account as the external directory object id of the mailbox. PS C:\> Get-Mailbox tmcmichael | fl name,externalDirectoryObjectID Name                      : Timothy…

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Office 365: Mail disable an on premises security group…

Administrators may enable security groups on premises as distribution groups.  [PS] C:\>Get-DistributionGroup BlogSecurityGroup Name              DisplayName       GroupType                  PrimarySmtpAddress —-              ———–       ———                  —————— BlogSecurityGroup BlogSecurityGroup Universal, SecurityEnabled BlogSecurityGroup@domain.org Azure Active Directory Connect will provision these groups and they will appear as mail enabled objects in Exchange Online. PS C:\> Get-DistributionGroup BlogSecurityGroup Name              DisplayName       GroupType                  PrimarySmtpAddress —-              ———–      …

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Office 365: Resetting a migrated users Azure Active Directory account….

In certain support circumstances it may become necessary to hard delete an Azure Active Directory account.  When the user has a mailbox that has been migrated to Exchange Online additional steps may be required to restore mailbox access. It is important to note that hard deleting an account should not be a common place operation. …

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Office 365: Trusting application emails sent through internal relay…

In todays connected environments there are several applications that send email through designated internal relay servers.  The messages may originate from application servers that generate notifications, scans from multifunction printers, or other network connected devices.  An excellent target for internal relay servers are the hybrid servers implemented for Office 365 integration or any Exchange 2010…

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Office 365: Internal forwarding and remote domains…

In Office 365 I often encourage customers to control user forwarding through the user of remote domains.  You can find two of my blog posts on this topic here:   https://blogs.technet.microsoft.com/timmcmic/2015/06/08/exchange-and-office-365-mail-forwarding-2/ https://blogs.technet.microsoft.com/timmcmic/2015/04/19/office-365-determine-accounts-that-have-forwarding-enabled/   In a default installation a remote domain is defined in the service only for the * domain.    PS C:\> Get-RemoteDomain Name                          …

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Office 365: Licensing mail users results in mailbox objects.

In Office 365 we allow administrators to create mail user objects.  A mail user object is a security principal in the local active directory that also has an external email address assigned.  The user will appear in the global address list as a recipient and when selected the messages sent to the external email address…

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