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[SOLVED] How To Solve Mailbox Exists On Premise And Office 365?

Managing accounts can sometimes feel like juggling multiple balls in the air, especially when mailbox exists on premise and Office 365. It’s a common scenario that many users grapple with, leading to a maze of confusion. Fear not, as I’m here to guide you through practical solutions to streamline your email management. In this article, we’ll explore two effective fixes that will have you waving goodbye to the perplexing world of mailbox duality. Let’s dive in!

So you’ve got a bit of a situation with mailbox exists on premise and Office 365, huh? No worries – I’ve got your back with some friendly advice and a few extra tips to beef up the info.

Imagine this: You’ve got a user juggling mailboxes, one in the cozy realm of on-premises and another hanging out in the cloud. Sounds familiar? Well, you’re not alone.

On premise mailbox:

mailbox exists on premise and office 365

Cloud mailbox:

user has mailbox on prem and office 365

Now, let’s dive into some nifty solutions to untangle this web.

Fix 1: Remove Exchange Online License

mailbox exists in both exchange online and on-premises
  • Click on Licenses and Apps, uncheck the licenses you want to part ways with, and hit Save changes.

Quick note: If the user inherits licenses from a group, you’ll need to remove them from that group first.

  • Once you’ve done the license limbo, your account will transform into a mail user in the cloud.
  • Now comes the migration magic: shuffle the on-premises mailbox to Exchange Online and slap on that Exchange online license.
  • Once everything looks spiffy in Microsoft 365, execute a mailbox restore request to move contents smoothly.

New-MailboxRestoreRequest -SourceMailbox “Softdeletedmailbox” -TargetMailbox “Activemailbox” -AllowLegacyDNMismatch

Fix 2: Bid Farewell to Microsoft Entra Active Directory Account

  • Exchange Online mailboxes cozy up with a Microsoft Entra Active Directory account. To part ways, connect to MSOnline PowerShell with a friendly Connect-Msolservice. Once connected, bid farewell to the user account using the Remove-MsolUser command.

Remove-MsolUser -UserPrincipalName -Force

  • Post-account removal, your Exchange Online mailbox will gracefully slide into the soft-deleted state, disappearing from the active user list.
  • After a sync dance, your on-premises account will show up in Microsoft Entra Active Directory as a mail user.
  • Now, glide that on-premises mailbox over to Exchange Online and sprinkle on the right license. Complete the process with a mailbox restore request for that smooth content transition.

And there you have it—that’s how you can untangle the knot when your mailbox exists on premise and office 365 game. By following these friendly steps, you’ll be waving goodbye to mailbox confusion and welcoming a streamlined, hassle-free email experience.

Ready to conquer your mailbox challenges? Share your success stories or drop your questions in the comments below. Your experiences might just be the key to helping others navigate the world of mailbox duality. Let’s build a community of mailbox maestros together!

Managing the intricacies of mailboxes existing in both on-premises and Office 365 environments can be a challenge, but armed with these two effective fixes, you’re now equipped to navigate the complexities with ease. Remember, it’s not just about solving the issue—it’s about transforming the way you manage your email accounts for a seamless experience. As you embark on this journey, feel free to share your experiences or ask questions in the comments below. Your mailbox matters, and so does your peace of mind. Happy troubleshooting!

Now, here’s a little extra for you: if you’re itching to boost your Exchange Online game and elevate your productivity, check out the tips and tricks in my bonus section.

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