Category: Exchange

Exchange Online, Basic Authentication end is near…

Microsoft is proactively working on securing their Exchange Online environment. Making your and indirectly other customers environments safer. For now Microsoft is going over all tenants and they will start disabling Basic Authentication. This will include all of the following services: Exchange Web Services (EWS), Exchange ActiveSync (EAS), POP,...

Office 365 implement Safe Links Policy (Manual)

Safe links is part of Defender for Office 365 that scans and rewrites URL’s in inbound email messages, Teams and other locations. Safe Links is an additional security layer on top of anti-spam and anti-malware protection. Safe Links scanning can help protect your organization from malicious links that are...

Anti-Spoofing Exchange Online rule (Manual)

Fraudulent emails are becoming a common cyber threat. Anti-spoofing mail rules set up in Office 365 can help. In these phishing schemes, scammers research internal company names and send emails that look like they are coming from the CEO or someone else in the company. Typically the scam emails...

Exchange Server fix logon error

In Exchange 2013 and 2016 after an upgrade you might get the following error after logging in. The URL with the error will look like this: owa/auth/errorFE.aspx?httpCode=500 Cause This issue occurs if the Exchange Server Open Authentication (OAuth) certificate is expired, not present, or not configured correctly....

Find inactive mailboxes in Exchange Online

So you want to clean up unused (shared) mailboxes in your Exchange (Online) environment. How to find out which mailboxes have been inactive for a long time? The answer is yet simple again, with a cool Power Shell script. First we will connect to Exchange Online...

Update Exchange Online Global Address List (GAL)

There are situations where you would like to enforce an update of the Exchange Global Address list (GAL) in Office 365. With a few steps this can easily be done! Requirements: Exchange Online EXO V2 module, install using: Import-Module -Name ExchangeOnlineManagement STEP 1: First we will need to make...

PowerShell script to export and import legacy Exchange x500 addresses (Manual)

When you’re migrating from one Exchange environment to another, or from on-premise to Exchange online without using the hybrid setup, the most forgotten part is the migration of the users x500 address. The reason why this is so important is because Exchange uses this to deliver local emails instead...

Exchange Online: Set default calendar sharing permissions for all users

In a new Exchange (Online) environment you might want to change the default calendar sharing permissions for all users. By default the sharing permissions for the entire organization are set to “Can view when I’m busy”. Some companies have a different wish on the default calendar settings of their...

Change default send items behavior of Auto-mapped Shared Mailboxes

A commonly heart end-user frustration with Auto-mapped shared mailboxes is that Send emails from the shared mailbox end up in the send items of the user it self. In the past you would need to set a registry key on the client computer to get this resolved. But with...

How to solve Failed to sync the ArchiveGuid in Office 365 (Manual)

Last few weeks I’ve been struggling with an very difficult Office 365 / Exchange Online case, that got escalated to multiple Microsoft departments to be fixed. I already found one part of the solution, but Microsoft found the second part. Today I would like to take you through all...

How to block non-modern authentication to Office 365 services. (Manual)

With Azure Conditional access you get more control over your data, get better security and visibility! To use this feature you will need to buy and assign Azure AD Premium or EM+S E3/E5 licenses to your users. This manual can be used to enforce the use of the Outlook...

Backup your Office 365 environment!

In the past two years, Over 50 percent of businesses experienced an unforeseen interruption, and the vast majority (81%) of these interruptions caused the business to be closed for one or more days. Did you know that 80 percent of businesses suffering a major disaster go out of business...

Microsoft Advanced Threat Protecion

Microsoft bied op verschillende diensten Advanced Threat protection aan. Helaas zit er marketing technisch nog steeds hier en daar de naam Defender aan vast, waar het onder water een compleet ander product is. Het is inmiddels geen simpel antivirus pakket meer, maar een all-in-one oplossing tegen aanvallen van buitenaf...

Microsoft Secure Score

Microsoft Secure Score is een manier om te meten hoe veilig je organisatie is in Office 365, Windows 10 en EM+S (Enterprise Management + Security). Hiermee kan je zien hoe veilig je organisatie is ten opzichte van het door Microsoft geadviseerde beleid, als ook andere bedrijven in dezelfde sector....