Category: Exchange

June 16th, 2021 by Exchange
It’s been a few months since our last update on Basic Authentication in Exchange Online, but we’ve been busy getting ready for the next phase of the process: turning off Basic Authentication for tenants that don’t use it, and therefore, don’t need it enabled....

Keep on reading: Basic Authentication and Exchange Online – June 2021 Update

Posted in Exchange

June 15th, 2021 by Exchange
Seeing that this is a relatively new development, I wanted to share information about automated diagnostics that customers can run inside of the Microsoft 365 admin center. The goal of these is to help you to solve various support-related issues that you might encounter, without having to open a support ticket. Currently, the way to interact with available diagnostics is via the Need help? button in the Microsoft 365 admin center: There are a few things you might see when you search in the text...

Keep on reading: Did you know? Automated diagnostics are available to troubleshoot various Office 365 issues.

Posted in Exchange

June 11th, 2021 by Exchange
We typically release our quarterly Cumulative Updates (CUs) for Exchange Server on the third Tuesday of a month. In June 2021, that would be June 15th. Today we want to let you know that the June CUs for Exchange Server will be released two weeks later, on June 29th instead. In addition to bug fixes and incorporating previous Security Updates (SUs) for Exchange Server, we are taking a little bit of extra time to finish adding a new security feature to Exchange Server.   Today's Security Lan...

Keep on reading: News About the June 2021 Cumulative Update for Exchange Server

Posted in Exchange

May 27th, 2021 by Exchange
Data Consistency Score (DCS) is a (somewhat) new feature for Office 365 migrations that scores the fidelity of migrated data, allowing admins to identify inconsistencies and integrity issues between source and target data when performing a migration to or from Office 365 (onboarding and offboarding). DCS is meant to replace the existing Bad Item Limit and Large Item Limit (BIL / LIL) model and related shortcomings....

Keep on reading: Migrations with Data Consistency Score (DCS) – more than you ever wanted to know!

Posted in Exchange

May 13th, 2021 by Exchange
As part of our continued efforts to help customers be successful with Exchange Online, Microsoft has detected that some customers are using an unsupported journaling configuration by pointing their journaling alternate mailbox to an Exchange Online mailbox. With the enforcement of mailbox receiving limits as announced in our February blog post, this may result in loss of journaling non-delivery reports, as cloud-hosted mailboxes will be throttled when they exceed the limit of 3600 messages...

Keep on reading: Prevent Journaling issues due to Exchange Online mailbox receiving limits

Posted in Exchange

May 11th, 2021 by Exchange
Microsoft has released security updates for vulnerabilities found in: Exchange Server 2013 Exchange Server 2016 Exchange Server 2019 These updates are available for the following specific builds of Exchange Server: Exchange Server 2013 CU23 Exchange Server 2016 CU19 and CU20 Exchange Server 2019 CU8 and CU9 The May 2021 security updates for Exchange Server address vulnerabilities responsibly reported by security partners and found through Microsoft’s internal processes. Although we are not...

Keep on reading: Released: May 2021 Exchange Server Security Updates

Posted in Exchange

May 6th, 2021 by Exchange
The public folder (PF) migration endpoint in Exchange Online contains information needed to connect to the source on-premises public folders in order to migrate them to Office 365. PF migration endpoint can be based on either Outlook Anywhere (for Exchange 2010 public folders) or MRS (for Exchange 2013 and newer public folders)....

Keep on reading: Troubleshooting Legacy Public Folder Migration Endpoints in Office 365

Posted in Exchange

May 5th, 2021 by Exchange
Last year we released the Reply-all Storm Protection feature to help protect your organization from unwanted reply-all storms. This feature uses global settings applicable to all Microsoft 365 customers for reply-all storm detection and for how long the feature will block subsequent reply-alls once a storm has been detected. Today we're pleased to announce you'll now have the ability to make these settings specific to your Microsoft 365 organization; email admins will have the flexibility to...

Keep on reading: Reply All Storm Protection Customizable Settings

Posted in Exchange

May 3rd, 2021 by Exchange
We often get questions regarding mail forwarding in Exchange Online. As you already know, Exchange Online is a shared service. We must take care that users cannot take the service down by creating mail loops. It is sometimes a little confusing for our customers that we handle this somewhat differently than in Exchange on-premises organizations. With this blog post we will give you an overview of how we handle possible mail loop scenarios and how this affects your mail flow. If you are the kind...

Keep on reading: Loop Prevention in Exchange Online Demystified

Posted in Exchange

April 29th, 2021 by Exchange
Today, we are happy to announce that the Exchange Health Checker PowerShell script has a new home: it is now part of the Microsoft CSS-Exchange repository on GitHub! With the new home comes a new versioning specification. Before the move, the version schema was structured like this: MAJOR.MINOR.PATCH (e.g. 3.1.2) The new version uses the following specification: YEAR.MONTH.DAY.HOURMINUTE (e.g. 21.04.21.1135) We auto generate the version number during our script build process. This will be update...

Keep on reading: Exchange Health Checker has a new home

Posted in Exchange