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Category: Exchange Server

Office 365 Hybrid Emails Stuck in Queue: target host responded 421.4.4.1 connection timed out mail-onmicroosft.mail.protecion.outlook.com.

Office 365 Hybrid Emails Stuck in Queue: target host responded 421.4.4.1 connection timed out mail-onmicroosft.mail.protecion.outlook.com. You receive the following error after running the Hybrid Configuration wizard, all emails are building up in the Exchange Queue. To resolve this issue, follow the below steps. Make sure that the all your exchange servers are added to the…

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Exchange 2016 Uninstall Fails on Mailbox Server Role: Client Access Service

Exchange 2016 Uninstall Fails on Mailbox Server Role: Client Access Service Recently I battled with this headache of an Uninstall of an Exchange 2016 server. In the Exchange Install Logs this is the error that you are seeing. ERROR ( message:Cannot find GLOBAL MODULE object with identifier “exppw:) To resolve this error, you can follow…

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Exchange Transport is rejecting submissions because the available disk space has dropped below the configured threshold.

Exchange Transport is rejecting submissions because the available disk space has dropped below the configured threshold. Microsoft Exchange Server makes use of back pressure monitor systems to prevent Exchange Server from being overwhelmed by the volume of incoming messages. What is Back pressure? Back pressure is a system resource monitoring feature of the Microsoft Exchange…

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How to Enable Mailbox Auditing in Office 365

How to Enable Mailbox Auditing in Office 365 By default, all non-owner access and administrative actions are recorded, but owner actions are not. Enabling mailbox auditing will include owner activity in the audit records, which will in turn enable you to investigate and scope a compromise of that user’s account. To enable auditing, The Microsoft…

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User receive the following NDR trying to send email from Exchange Online: 550 5.1.8 Access denied, bad outbound sender.

User receive the following NDR trying to send email from Exchange Online: 550 5.1.8 Access denied, bad outbound sender. If you receive the following error, then it means that your account has been sending out too much spam and has been blocked from sending emails. Typically, this problem occurs because the users account has been…

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Block Office 365 Sign-In based on On-premise Active Directory Security Group.

Block Office 365 Sign-In based on On-premise Active Directory Security Group. The purpose of this guide is the assist support staff to block access to multiple accounts that has been compromised. To get started, login to Azure Active Directory Portal. https://portal.azure.com 1 From the Main menu, click on Azure Active Directory on the left-hand side.…

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The Connection to the Server could not be completed Migrating to Exchange Online

The Connection to the Server could not be completed Migrating to Exchange Online Use receive the following error when migrating from Exchange On-Prem to Exchange Online. After receiving this issue, I decided to look further into the MigrationEndPoint using PowerShell for EXO.

Here I can see that the user who created the Hybrid Setup…

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Apply Exchange 2013/2016 License Key using PowerShell.

Apply Exchange 2013/2016 License Key using PowerShell. Let’s first have a look at what the current license status is by running the following.

As we can see from the below image, the server has not been licensed yet and is still running as a Trial. To set the license key, we can run the…

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Enable MFA without assigning Global Admin Privileges to support staff

Enable MFA without assigning Global Admin Privileges to support staff The purpose of this post is to provide an alternative method of enabling MFA on user accounts without assigning Global Admin Permissions to all support staff. Please take note that this solution is based on Azure AD Conditional Access. This option can be used to…

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