MigrationPermanentException: Target user already has a primary mailbox in Office365 Exchange Online

Exchange Online

In a Microsoft Office365 migration project, I faced the following error trying to migrate a mailbox from an on-premises Exchange 2013 database to Exchange Online: Error: MigrationPermanentException: Target user ‎’Doodle, Johnny’ already has a primary mailbox. –> Target user ‎’Doodle, Johnny‎’ already has a primary mailbox. I was sure I hadn’t migrated Johnny’s mailbox before. …

Read moreMigrationPermanentException: Target user already has a primary mailbox in Office365 Exchange Online

550 Empty envelope senders not allowed in Exchange Online Office365 hybrid

Exchange Online

Issue In a hybrid Exchange environment of Exchange 2013 and Exchange Online, mail sent to a specific distribution group was only delivered in some mailboxes. Investigation The issue had the following characteristics Sender is an Office365 user Distribution group contains both O365 users and on-premises users Mail sent to this Distribution group is only received …

Read more550 Empty envelope senders not allowed in Exchange Online Office365 hybrid

O365 Skype for Business – Lync cannot verify that the server is trusted for your sign-in address

During a pilot migration from Lync 2013 to Skype for Business Online (Office 365), the following warning popped up: Why does Lync 2013 not trust its own company? :) Appearantly we had configured a group policy a long time ago, which was set to only trust our own company name. I.e. contoso.com. Once you Enabled …

Read moreO365 Skype for Business – Lync cannot verify that the server is trusted for your sign-in address

Get-AzureRmAnalysisServicesServer : Object reference not set to an instance of an object. in Azure

To manage Azure Analysis Services from Powershell, you first need to install the module AzureRM (elevated Powershell!) : Install-Module -Name AzureRM -AllowClobber Then, import the module: Import-Module AzureRM Then, when I tried to get all Azure Analysis Services from my Azure Subscription, I got the following error: PS C:\WINDOWS\system32>Get-AzureRmAnalysisServicesServer -ResourceGroupName AnalServices Get-AzureRmAnalysisServicesServer : Object reference …

Read moreGet-AzureRmAnalysisServicesServer : Object reference not set to an instance of an object. in Azure

0x80070070 Installation Failure: Windows failed to install the following update with error 0x80070070

During my monthly patch maintenance evening I stumbled upon the following error on one of my servers: Log Name: System Source: Microsoft-Windows-WindowsUpdateClient Event ID: 20 Task Category: Windows Update Agent Level: Error Keywords: Failure,Installation User: SYSTEM Description: Installation Failure: Windows failed to install the following update with error 0x80070070: 2018-01 Security Monthly Quality Rollup for …

Read more0x80070070 Installation Failure: Windows failed to install the following update with error 0x80070070