Email Authentication by using DMARC, DKIM and SPF
In this post I want to show how you can prevent that your email domain is abused for email spoofing…
Set up DomainKeys Identified Mail (DKIM) in Office 365
Either you can set up DKIM by using the Microsoft 365 Defender portal or manually by using PowerShell. First I…
ZeroConfigExchange & ZeroConfigExchangeOnce
Creating an Outlook profile is very easy and a wizard will guide you throughout the process. The wizard therefore uses…
Outlook 2016/2019 Click to run – Adding multiple Office 365 E-Mail Profiles – Sorry, another account from your organization is already signed in on this computer
Recently I wanted to configure two E-Mail profiles on a Windows 10 computer, each of them should include an Office…
How to reject Emails in Office 365 they fail DMARC
EASYDMARC had an interesting blog post about DMARC handling with Microsoft 365. DMARC and Microsoft : What is Happening?https://easydmarc.com/blog/dmarc-and-microsoft/ You…
Set up DomainKeys Identified Mail (DKIM) on Exchange on-premise
Out of the box on-premise Exchange Server doesn’t support DKIM signing. To deploy DKIM for your on-premises Exchange Servers you…
Set up Exchange on-premise to relay outbound Emails to the Internet via Exchange Online Protection (EOP)
If you had an Exchange Hybrid configuration, you can route also outbound email messages from your on-premise mailboxes through Exchange…
Azure AD Connect – Unable to validate credentials due to an unexpected error.
In case you will get the following error message at connecting to Azure AD, there will be a good chance…
Restore deleted Microsoft 365 Hybrid User
If you need to restore a Microsoft 365 hybrid user account which was synced from on-premises Active Directory to Azure…
Renew Edge Subscription in Exchange Server after Cumulative Update
Last weekend I updated my on-premises Exchange Servers with the new cumulative update and therefore had to renew the Edge…