Configure Free/Busy Cross Request (Exchange Online and Exchange on-premise) when both Organizations are Hybrid
In my post below I was showing how you can configure free/busy calendar information for hybrid organizations, but only to share it…
Configuring federated sharing (free/busy calendar information) between Exchange Hybrid Organizations
In my last post we saw, how to configure federated sharing between two on-premise Exchange organizations. Now in this post I want to…
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…
Exchange Online – Plus Addressing
For Exchange Online you can use since September 2020 Plus Addressing. With Plus Addressing your users can create own custom…
Enable Hybrid Modern Authentication for on-premises Skype for Business and Exchange servers – Part 1 Exchange Server
In this post we will configure Hybrid Modern Authentication (HMA) on our on-premises Exchange Server. This post is split into…
Microsoft 365 Admin Center – Annoying Warning and Status Messages you can ignore
In this post I want to collect some annoying warning and status messages in the Microsoft 365 Admin Center, you…
Exchange Online – We are preparing a mailbox for the user – Accounts still have an on-premise Mailbox and ExchangeGUID is synced successfully to Office 365
Recently I noticed a strange behavior with Exchange Classic Full Hybrid for users who synced to Office 365 and have…
error – The connection to the server could not be completed | MRS Proxy Server
If you change the password of an Exchange administrator account, which is associated to the Hybrid Migration Endpoint (MRS Proxy…
Bypass spam filtering in Exchange Online (Office 365) for specific Sender Domain
If you want to exclude specific domains from scanned by spam filtering, you can add a rule under mail flow…
Office 365 / Exchange Online Block Sender Domain
The procedure is the same whether you use the Classic Exchange admin center or the new Exchange admin center. Go…