Microsoft released Cumulative Update 11 for Exchange Server 2019 (KB5005334) on September 24, 2021. Also known as Exchange Server 2019 CU11. This Cumulative Update includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These…
Microsoft released Cumulative Update 22 for Exchange Server 2016 (KB5005333) on September 24, 2021. Also known as Exchange Server 2016 CU22. This Cumulative Update includes fixes for nonsecurity issues and all previously released fixes for security and nonsecurity issues. These…
The Microsoft Exchange Server Auth Certificate is installed when you install an Exchange Server, and it's 5 years active. Most of the time, you don't look into that certificate because, within 5 years, you will have a new Exchange Server…
We are upgrading Exchange 2016 CU20 to Exchange 2016 CU21. That's because updates for Exchange Servers are essential, just like all other systems. Bugs get fixed, and new features get introduced. This time an error occurs that the installation package…
Did you run Exchange Server in the past, but you have since uninstalled all Exchange Servers in the organization? Do you run an Exchange Server older than Exchange Server 2013 in the organization? This article is essential for you, and…
We want to create a Hybrid deployment between Exchange on-premises and Exchange Online. When we run the Office 365 Hybrid Configuration Wizard for the first time, go through all the steps and click on update, we get the error: HCW8077…
You like to remove a mailbox server from DAG (Database Availability Group). However, when performing the removal task, you get the error: Mailbox server cannot be removed from the Database Availability Group because mailbox database has multiple copies. Use Remove-MailboxDatabaseCopy…
The time has come, the Exchange Server DAG (Database Availability Group) member failed, and it's not starting anymore. Of course, this is not great news because one Exchange Server failed. However, as long as you have a DAG configured, the…
Frustration about the autodiscover URL when you migrate to Office 365/Microsoft 365. Where do you need to point your autodiscover URL to in an Exchange Hybrid configuration? Do you need to point the autodiscover record to the Exchange on-premises or…
How to renew a certificate in Exchange Hybrid? You have a new third-party certificate installed on the Exchange Server. Now that you finished that task, you like to remove the old certificate. But you get a message that these certificates…