I came across the call to ‘https://mail.domain.com/EWS/mrsproxy.svc failed error while trying to move a mailbox from Exchange on-premise to Office 365.

I was at a customer site who was having issues with Azure AD Connect not synchronizing shared and resource mailboxes to Office 365. In short, any accounts that is in a disabled state.

How to go past the ‘Adding Federated Domain’ status in the hybrid configuration wizard, while running from an Exchange 2016 CU7 server?

One of the first questions that you get from the security folks who will be involved in an Office 365 migration project is the actual location of the organization data. While you can broadly answer the locations as US, EU etc, I am sure they will want a more precise answer.

UK based organizations may have a requirement to have their data at rest in a UK based Office 365 datacentre. It may be to satisfy compliance requirements or due to the upcoming Brexit. Microsoft has an answer for organizations that fall in this category – move your data back!

Failed move requests is a common occurance in any Exchange migration, whether it is to a new version of on-prem Exchange or to Office 365. One of the main reasons for a failed move is that there are more bad items in the mailbox than what is set on the move request. 

A common problem that I have seen at client sites is the free/busy failure while looking up an on-premise mailbox from a migrated user. In this article, we will look at the common steps to troubleshoot the issue.