Hello Folks,
Today I will show you how we can use one of the best service for out MX backup. It will help you if you are planning to start tenant-to-tenant migration, or any other migration type. So, no more non-technical words, let’s go!
What we have:
Classic Office 365 tenant with some users and added domain name (ostestlab.ru).
What we want: transfer domain name ostestlab.ru to another Office365 tenant.
- Let’s check that everything work good:
- Let’s register our MX backup service
I use https://www.duocircle.com/email/email-backup-mx (You can register trial here):
- Now we need to add second MX to our external DNS service and test it.
I use http://www.digwebinterface.com:
- Delete domain name from the Office365 tenant (script you can find here):
- After you deleted domain’s name from one tenant, you must wait 20-40 mins (Microsoft says that it can take up to 72 hours) before you can add domain to a new tenant and at this time senders will see NDR, but we added our backup MX and all mails will go to backup service:
- After you added domain to a new tenant and created all necessary user’s accounts you can add Destination service to your Admin Panel:
- After you added Destination Server Name your users will get their messages (which they received when domain wasn’t added to a new tenant) :
- Then you can check it in message’s logs:
I hope this article will help you and your customers migrate to Office 365 without any downtime.
Oleg Shalnov IT notes 