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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Office 365: SPAM detection and reverse DNS lookups.

In Office 365 support we occasionally receive requests to review non-deliverable reports.  In some instances the non-deliverable reports are generated by remote mail systems antispam technologies – specific reverse DNS looksups.   What is a reverse DNS lookup.  Let’s take a look.   An email is addressed from an Office 365 mailbox to a remote…

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Office 365: Start-ManagedFolderAssistant in Office 365

In Office 365 administrators can invoke the managed folder assistant by using the start-ManagedFolderAssistance command.   PS C:\> Start-ManagedFolderAssistant tmcmichael@domain.com   This week I had a customer present with an issue where the invocation of the managed folder assistance was failing with a generic RPC error.   “The call to Mailbox Assistance Service on server:…

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Office 365: Troubleshooting distribution lists and distribution list membership…

In Office 365 administrators may discover issues with distribution lists and distribution list membership.  In this article I wanted to walk through some of the common issues that I have seen and how we worked through them.  When working with distribution lists and distribution list membership we must review the locations where this information is…

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Office 365: Office 365 Groups and External / Guest Accounts

In support you often have interesting cases come across your desk – and sometimes the questions and situations presented are odd.  On occasion you look at some of them and are like that’s impossible…and that’s what happened here. In this escalation, the customer was reporting that when they would remove a user from an Office…

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