You like to offboard a mailbox from Exchange Online to Exchange On-Premises. This time you get the error: ArchiveGuidsDontMatchPermanentException: The archive GUIDs on source 'Simon Berry' and target 'Simon Berry' recipients don't match. Source archive GUID: 00000000-0000-0000-0000-000000000000, target archive GUID:…
We have to offboard a mailbox from Exchange Online to Exchange on-premises. After following the steps, we get a mailbox move failure at the end, and the mailbox will not complete. Why is the mailbox move failing, and what is…
IPv6 is not enabled by default in the Microsoft 365 tenant for Exchange Online. You like to configure inbound email in Exchange Online to support IPv6. There is also no option right now to enable it. But does that mean…
Users get a Microsoft credential prompt in the Outlook client. This does not matter when you restart Outlook or create a new Outlook profile. It keeps prompting for the Office 365/Microsoft 365 credentials. But, the mailboxes are not in the…
When you migrate mailboxes to Exchange Online - Microsoft 365, you might want to add a new Exchange Server that will act as the Exchange Hybrid server. If you only migrate and remove the server or keep it only for…
How to prevent spam messages? There are guidelines that you have to configure, so the domain is protected against spam, phishing attacks, and viruses. In this article, you will learn how to protect your domain from spam, phishing, and viruses.…
Microsoft automatically enables security defaults in new Microsoft 365 tenants to protect you from phishing and other identity-related attacks. What if you want to use basic authentication and you need to turn off security defaults in Office 365? Sometimes you…
How to configure DMARC for Office 365? We have already configured SPF and DKIM, and we like to set up DMARC for Office 365. DMARC is excellent for protecting the domain against abuse by phishers and spammers. In this article,…
After you migrate the mailboxes to Microsoft 365/Office 365 and all the SMTP relay goes through Office 365, you want to decommission all the Exchange Servers on-premises. Now, even if that would be possible and you can do that, it's…
When all the mailboxes are in Exchange Online, and all the SMTP relay goes directly from the devices and applications to Office 365, we can remove the Exchange Hybrid Configuration. After that, keep only one Exchange Server for management purposes.…