The ramblings of a computer geek
Investigation into the loss of Rich Hybrid features for on-premise mailbox users, from around the beginning of November 2025. Exchange Version Says we need Exchange Server 2016 CU23 with April 2025 HU 15.1.2507.55, we are currently running 15.1.2507.58, so a later version than the minimum requirement, thus we are good on this version. Identified Issue … Read more
The document provides a simple guide to how to install and use the Microsoft Exchange Online PowerShell modules to interact with Microsoft 365 infrastructure for the purposes of administering the Microsoft 365 infrastructure and applications; i.e. how to setup your Developer Machine. You may be able to install modules without administrative rights by adding the … Read more
The document provides a simple guide to how to install and use the Microsoft Graph and Microsoft Exchange Online PowerShell modules to interact with Microsoft 365 infrastructure for the purposes of administering the Microsoft 365 infrastructure and applications; i.e. how to setup your Developer Machine. You may be able to install modules without administrative rights … Read more
We have a user which has somehow added a proxyAddress (an email address to their account) but they don’t have an Exchange Online mailbox, and seemingly never have. Microsoft says the following about it from this article: An example of the problem can be seen below, as you can see the object on the right has … Read more
So you created an Exchange Online User and Mailbox but you’re still in a hybrid configuration where you are managing Exchange mailboxes on-premise. What this means is that the on-premise Exchange Organisation has no idea that the user exists, it doesn’t appear in Exchange Admin Center and it also probably won’t appear in the GAL. … Read more
We are currently going through a migration from on-premise Microsoft Exchange servers to Microsoft Exchange Online (Microsoft 365). We needed to determine what ActiveSync clients were in use to be able to provide guidance to users of what to do. So I wrote a simple script that retrieves all the mailboxes (that are enabled) and … Read more
As a test we are using OpenSSL to perform some credentials testing using an Enterprise Application configured in Microsoft 365 to connect using IMAP(S) and SMTP via OpenSSL to validate how OAuth modern authentication works. Create Enterprise Application Firstly we create an Enterprise Application, we are going to be using Win64 OpenSSL v3.3.3 Light on … Read more