Office365 - NianIT

Outlook certificate warning when adding an Exchange server

Certificate warning when adding an Exchange server Background When introducing a new Exchange server in an existing organization there is a common issue that appears.The new server doesn't have any certificates and because of this you will most likely see this message in Outlook on clients that are connected to your environment. I've seen this at multiple customers when they are installing a new Exchange 2016 server and adding it to their existing environment. A common scenario where this occurs is when you have an Exchange environment and a Office 365 tenant and are in the final steps of migrating to…

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January 30, 2018

Exchange Online / Office 365 / Skype for Business

Office 365 – A users password is not working

Hi, In my environment there is a DirSync server with password sync, an Active Directory and a tenant for Office 365.Some users had issues logging on to their Outlook and Skype even though they were using the correct information.After some troubleshooting we noticed that the password sync had failed for these users. The first step to figure this out was to change the users password from the Office 365 administration portal.We had no issues logging on with the new password that was created. To solve this we took the following steps.On the DirSync server, open powershell and run Import-Module Dirsync.Run…

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August 20, 2015

Azure / Exchange Online / Office 365 / Powershell

Office 365 – Change UPN for an existing user

Hello, Sometimes you might have to change the UPN for a user that has already been synced to the cloud.This can be due to typos during creation, a new surname or similar scenarios. You can change the UPN in the local Active Directory but this will not sync to the cloud with DirSync.This is due to that the UPN in Azure Active Directory is created during the first sync and it will not be changed by any future sync. To resolve this you have to change the value manually using powershell.You need to download and install this Microsoft Online Services…

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June 9, 2015

Exchange Online / Office 365 / Powershell

Office 365 Set resource calendar permissions

Hi, As more and more of users move to the cloud the requirements for administrators change.Simply starting Powershell is no longer enough as the systems we want to configure and monitor are further away from us.Fortunately for us the step to connect to Office 365 is quite easy, as long as you know what to do.I have a script to connect using the cmdlets in step 1. The default settings for resource calendars in Office 365 is to show you busy/free information and nothing else. This can't be changed from the web-gui, but we can easily do it from Powershell.…

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January 28, 2015