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Category Archives: Exchange Online

Exchange Online

Exchange migration “Couldn’t switch the mailbox into Sync Source mode”

Written on April 8, 2019 at 10:00 AM, by

The issue During one of my Exchange Online migration projects I encountered the following error on several mailboxes: “Message : Error: Couldn’t switch the mailbox into Sync Source mode. This could be because of one of the following reasons: Another administrator is currently moving the mailbox. The mailbox is locked. The Microsoft Exchange Mailbox Replication […]

TOOL: My own Exchange Move Request Report script

Written on January 28, 2019 at 6:00 PM, by

As a consultant I do a lot of migrations or assist in them. In this case I wrote my own script for processing the information generated by the Mailbox Replication Service. This service is used in Microsoft Exchange on-premises and in the cloud for migrating the mailboxes between databases or environments. After multiple times doing […]

The mysterious case of a failed account recovery and orphaned mailbox

Written on January 14, 2019 at 11:25 AM, by

In this blogpost I want to address two real-life cases that I encountered in the same Microsoft Office 365 tenant. The reason why I address the two issues in this one blog is because the errors and steps to resolution, were identical for both issues. Background Information The issues occurred in a cloud-only tenant. The […]