O365 – reverting hard matching migration using ImmutableID

By Tom Kitching

This is a very obscure problem, so I’m recording this more for my own reference in future rather than expecting anyone else to have the same issue! The issue occurs when a migration from a hybrid exchange domain to another domain which uses AD Sync has been completed in the following manner: filter/delete user in…

Adding Users to O365 Distribution List

By admin

A script I recently used to add members to an office 365 distribution group using a remote exchange session in a hybrid setup (covered at the end). 

CSV file contains UPNs of all users to be added. I also found it useful to see who had permissions to send to this group using

Add New Users using Exchange Admin Center (Exchange 2016)

By admin

This only applies to new Active Directory users.  To look at how to use SMTP matching to link an on-prem user to an existing O365 mailbox in a hybrid environment follow this guide.1. Log into the Exchange Admin Center: https://mail.contoso.com/ecp2. In the EAC console of your on-premises hybrid server, go to Recipients > Mailboxes and click…