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Microsoft 365 Blog: Licensing, Administration & Expert Guides

Master Microsoft 365 — from licensing and plan selection to Exchange Online administration and Teams deployment. Guides from certified Microsoft professionals.

367 Articles11 Expert AuthorsUpdated Weekly

Page 5 of 13 — Showing 30 of 367 articles

3 min readSreenivasa Reddy G

Configure Exchange Online Certificate-Based Authentication for Unattended Scripts

Automating Exchange Online PowerShell scripts often requires secure, unattended authentication without manual input. Traditional username-password methods are unsuitable for automation due to multi-factor authentication (MFA) requirements. Instead, Certificate-Based Authentication (CBA) allows secure, unattended script execution. This article explains how to set up Exchange Online Certificate-Based Authentication and automate PowerShell scripts for Exchange Online. Why Use […]

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4 min readSreenivasa Reddy G

How to Fix ‘Office 365 Hybrid Configuration Wizard Can’t Start’

Facing issues with the Office 365 Hybrid Configuration Wizard not starting? Learn why this happens and follow step-by-step solutions to resolve the problem quickly and set up your hybrid Exchange deployment. Creating a hybrid deployment between an on-premises Exchange Server and Office 365 requires running the Microsoft Office 365 Hybrid Configuration Wizard (HCW). However, some […]

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4 min readSreenivasa Reddy G

How to Fix ‘Get-OfflineAddressBook is Not Recognized’ in Exchange Online PowerShell

Encountering the error message “Get-OfflineAddressBook is not recognized as the name of a cmdlet” can be frustrating, especially when managing address books in Microsoft 365 Exchange Online PowerShell. This issue arises because the Get-OfflineAddressBook cmdlet is not available in Exchange Online, unlike in on-premises Exchange Server environments. This article explains the cause of this error […]

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3 min readSreenivasa Reddy G

Connect to Exchange Online PowerShell 2026

Managing Exchange Online environments efficiently often requires the use of PowerShell. Before administrators can execute commands, they must first establish a connection to Exchange Online PowerShell. This article provides a step-by-step guide to connect to Exchange Online PowerShell, including prerequisites, installation steps, and connection options for both standard and Multi-Factor Authentication (MFA) environments. Why Use […]

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4 min readSreenivasa Reddy G

How to Disable EWS Throttling in Microsoft 365 for Faster Migrations

Migrating mailboxes to Microsoft 365 (Exchange Online) can be a time-consuming process, particularly when dealing with legacy systems like Exchange 2010. One common bottleneck is the Exchange Web Services (EWS) throttling policy, which limits resource usage to maintain system stability. While these policies are essential for fair resource allocation, they can slow down migration projects. […]

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3 min readSreenivasa Reddy G

How to Get Exchange Online Mail Traffic Reports with PowerShell

Organizations frequently analyze email traffic to gain insights into communication patterns, security, and operational metrics. With PowerShell’s Get-MailTrafficATPReport cmdlet, administrators can retrieve detailed mail traffic reports for Exchange Online. This article outlines how to use this tool to obtain comprehensive inbound and outbound mail traffic data. Why Monitor Mail Traffic? Understanding mail traffic is essential […]

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4 min readSreenivasa Reddy G

How to Enable and Use the Send from Alias Feature in Microsoft 365

Microsoft 365 now supports the ability to send emails from alias addresses, a long-awaited feature that enhances email flexibility. This functionality is limited to Exchange Online mailboxes and does not work with Exchange on-premises mailboxes. In this article, we’ll guide you through enabling the feature in your Microsoft 365 tenant and demonstrate how to send […]

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4 min readSreenivasa Reddy G

How to Resolve “Create Shared Mailbox with Same Alias” Error in Microsoft 365

Creating a shared mailbox in Microsoft 365 is typically straightforward, but you might encounter an error stating that the email address (alias) is unavailable because it’s already in use. This article explains why this issue arises and provides a step-by-step guide to resolve it effectively. Why Does This Error Occur? Microsoft 365 requires unique email […]

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4 min readSreenivasa Reddy G

Azure AD Connect Unable to Validate Credentials: Causes and Solutions

Azure AD Connect is a critical tool for synchronizing on-premises Active Directory environments with Entra ID (Formally Azure Active Directory). Occasionally, during upgrades or installations, users encounter the error “Unable to validate credentials due to an unexpected error.” This issue can disrupt synchronization and delay critical updates. This article outlines the common causes of this […]

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4 min readSreenivasa Reddy G

How to Configure SpamBull Spam Filter with Exchange Online

Email security is paramount in today’s digital landscape, where spam emails and phishing attempts grow increasingly sophisticated. SpamBull, designed for simplicity and effectiveness, offers a robust solution to protect organizations against these threats. Integrating SpamBull with Exchange Online ensures a seamless and secure email environment, enhancing productivity while mitigating risks. This comprehensive guide outlines how […]

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4 min readSreenivasa Reddy G

How to Configure Microsoft 365 to Only Accept Mail from a Third-Party Spam Filter

Using a third-party spam filter with Microsoft 365 can significantly enhance email security by filtering out threats like phishing, malware, and spam before they reach your organization. However, improper configuration can leave your organization vulnerable. Without locking down Microsoft 365, attackers could bypass the third-party filter and deliver malicious emails directly to your mailboxes. This […]

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4 min readSreenivasa Reddy G

How to Import PST Files to Office 365

Importing PST (Personal Storage Table) files into Microsoft 365 is essential for organizations transitioning to Exchange Online. This process ensures that historical email data is migrated seamlessly, providing employees with uninterrupted access to their emails, contacts, and calendars. This article provides a comprehensive guide to importing PST files into Office 365, detailing each step for […]

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4 min readSreenivasa Reddy G

Configuring Outbound Mail Flow via Microsoft 365 for Exchange Hybrid Environments

In today’s digital landscape, seamless and secure communication is vital for businesses. Exchange Hybrid environments provide the flexibility of managing on-premises and cloud mailboxes. Configuring outbound mail flow via Microsoft 365 is essential for ensuring that emails sent from on-premises Exchange servers are routed through Exchange Online Protection (EOP). This setup enhances email security and […]

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5 min readSreenivasa Reddy G

How Attackers Bypass Third-Party Spam Filtering and How to Prevent It

Email security is a critical component of modern IT infrastructure. Organizations often deploy third-party cloud spam filters to enhance email security. However, attackers continuously develop techniques to bypass these filters and deliver malicious emails to users. This article explains how attackers bypass spam filtering systems, highlights common vulnerabilities, and provides actionable solutions to mitigate these […]

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4 min readSreenivasa Reddy G

How to Check and Release Microsoft 365 Quarantined Emails

Managing quarantined emails in Microsoft 365 is essential for ensuring secure and efficient communication. Microsoft 365, powered by Exchange Online Protection (EOP), automatically detects and quarantines suspicious emails flagged as spam, phishing attempts, or malware. However, legitimate emails are sometimes marked as false positives, requiring manual review and release. This article provides a step-by-step guide […]

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4 min readSreenivasa Reddy G

How to Manage Microsoft 365 with Group Policy

Managing Microsoft 365 settings through Group Policy is a powerful way to enforce configurations, improve security, and streamline administrative tasks across an organization. By leveraging Administrative Templates (.ADMX/.ADML), IT administrators can control features in both Microsoft Office and Microsoft 365 Apps for Enterprise without needing manual configurations on each device. This guide explains how to […]

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3 min readSreenivasa Reddy G

How to Remove Alias from Microsoft 365 Groups (Unified Groups)

Managing aliases in Microsoft 365 Groups, also known as Unified Groups, is crucial for keeping email addresses organized and accurate. Unified Groups provide collaboration features for Microsoft 365, such as Outlook, Teams, and SharePoint. However, organizations often need to remove outdated or unnecessary aliases from these groups to maintain email hygiene and streamline communication channels. […]

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4 min readSreenivasa Reddy G

Fix Winmail.dat Attachment in M365: A Comprehensive Guide

When sending emails from an M365 mailbox, some recipients may encounter a problematic issue: instead of receiving the intended attachment (such as a PDF file), they receive a mysterious file named “Winmail.dat.” This problem often leads to confusion and frustration, particularly when the recipient’s email client cannot open or interpret the Winmail.dat file. In this […]

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4 min readSreenivasa Reddy G

Resolving Azure AD Connect Sync Export Error: dn-attributes-failure

Azure AD Connect plays a critical role in synchronizing on-premises Active Directory (AD) with Microsoft Entra ID (Azure AD). However, errors during synchronization can disrupt this process, causing inconsistencies and failed updates. One common issue is the dn-attributes-failure error, which appears as completed-export-errors in the Synchronization Service Manager. This article explains the causes of this […]

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4 min readSreenivasa Reddy G

Troubleshooting Exchange Online Users Unable to View On-Premises Calendar Information

Organizations with an Exchange Hybrid configuration often rely on seamless collaboration between Exchange Online and Exchange On-Premises users. However, calendar availability issues can arise, preventing Exchange Online users from viewing Free/Busy (F/B) information for on-premises calendars. This guide explains why this issue occurs and provides step-by-step solutions to resolve it. Understanding the Issue In a […]

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4 min readSreenivasa Reddy G

Troubleshooting Export Search Results Errors in Microsoft 365 Compliance Center

To Export search results in the Microsoft 365 Compliance Center, such as exporting mailbox content to PST files, is a critical feature for organizations managing eDiscovery and compliance. However, errors can occur during the export process. These errors often stem from missing permissions or incorrect cmdlet parameters. This article explains the common causes of these […]

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