Category: Exchange

July 17th, 2018 by Exchange
I'm growing increasingly frustrated with .NET Framework updates. Microsoft released .NET Framework 4.7.2 as an "important" update on July 10, 2018 and problem reports immediately started pouring in. I reported earlier that .NET Framework 4.7.2 is not supported on any Exchange Servers and many users, including myself, were seeing high CPU usage on AAD Connect servers. Doesn't anyone test this stuff, or is that our job as customers? What's the point of pushing out an update as "important" th...

Keep on reading: .WHY?

Posted in Exchange

July 16th, 2018 by Exchange
The Exchange team is aware of issues with the Windows Operating System updates published July 10th, 2018 causing Exchange to not function correctly. The Windows servicing team has advised us that they will be releasing updates to the affected packages. We encourage Exchange customers to delay applying the July 10th updates, including the security updates released on the same date, on to an Exchange server until the updated packages are available. The Exchange Team

Keep on reading: Issue with July Updates for Windows on an Exchange Server

Posted in Exchange

July 15th, 2018 by Exchange
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/of...

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

Posted in Exchange

July 10th, 2018 by Exchange
You may notice that Windows Update is offering Microsoft .NET Framework 4.7.2 (KB4054566) as an optional important update to Windows Server 2012 and Windows Server 2016 servers. This version of .NET Framework is not supported for any version of Exchange Server, so it should not be installed on those servers. Always refer to the Exchange Server Supportability Matrix for the latest information about the level of support available for any configuration or required component for supported v...

Keep on reading: Do Not Install .NET Framework 4.7.2 on Exchange Servers

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July 7th, 2018 by Exchange
Changes and updates made to “Office 365 for IT Pros (2019 edition) Original release: July 1, 2018. This document describes the changes made to the book since its original release. The document is up-to-date as of the version released on July 7, 2018. We try and release an updated version regularly, usually on a Saturday unless something like a major conference disrupts our ability to produce an update. Overall Chapter Number (bold) and number of changes 1 2 3 4 5 6 7 8 9 10 1 1 1 1...

Keep on reading: Update Log for Office 365 for IT Pros (2019 Edition)

Posted in Exchange

July 3rd, 2018 by Exchange
Over the last few years, we have been investing in services that help developers access information in Office 365 in a simple and intuitive way, specifically through Microsoft Graph.  Microsoft Graph and the use of OAuth 2.0 provide increased security and seamless integration with other Microsoft cloud services and is rapidly expanding developer access to the rich data sets behind Microsoft applications.  ...

Keep on reading: Upcoming changes to Exchange Web Services (EWS) API for Office 365

Posted in Exchange

July 3rd, 2018 by Exchange
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 contained within the migration process is the DATA MIGRATED tab.  When enumerating the users within a migration batch, and selecting a mi...

Keep on reading: Office 365: Exchange Migrations and the data migrated information…

Posted in Exchange

July 1st, 2018 by Exchange
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 attributes are locked with a source of authority flag establishing on premises as the SOA.  The implications here are that changes to these...

Keep on reading: Office 365: The mystery of mobile phone…

Posted in Exchange

June 26th, 2018 by Exchange
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 McMichael ExternalDirector...

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

Posted in Exchange

June 25th, 2018 by Exchange
We often get questions about throttling in Mailbox Replication Service (MRS) based migrations in Exchange online. When migrating, you may see messages such as StalledDueTo_TargetDiskLatency for some periods of time. These messages come from our resource-based throttling infrastructure in Exchange Online. This is how this would look like in the output of Get-MoveRequestStatistics: PS C:> Get-MoveRequestStatistics <user> | fl Status,StatusDetail Status : InProgress StatusDetail : StalledD...

Keep on reading: Resource Based Throttling and Prioritization in Exchange Online Migrations

Posted in Exchange