Remove Mailbox with -Type Workspace

Question

Hello,

I have a setup of two m365 tenants connected to each other.

I have created a Mailbox with Type Workspace on one tenant

New-Mailbox -Room <NAME> | Set-Mailbox -Type Workspace

Now I would like to remove the Workspace to add it to the other tenant.

I can remove the Mailbox of the Workspace but I still get the error.

The name "<NAME>" is already being used. Please try another name.

... when I try to create the Workspace on the other tenant.

I also tried the solution mentioned here:

https://learn.microsoft.com/en-us/microsoft-365/troubleshoot/authentication/office-365-user-with-name-already-exists

If the mailbox is deleted the cmdlet returns nothing on both tenants.

Many thanks in advance.

Answer 1

We found the root cause for this issue. There had been a contact with the same name created which I failed to find via powershell.

Answer 2

Dear Thomas Doczkal,

Many thanks for your kind response and cooperation,

I do understand your query here but, your query needs to be checked from back-end side, and since we are belong to Microsoft Community site, we have limited resource and privilege to examine back-end related scenarios. Therefore, for your concern, I sincerely recommend that you contact our dedicated technical support team via admin center Get support - Microsoft 365 admin | Microsoft Learn.

Since, our dedicated technical support team have more resources than us, they will check your query from back-end side and will assist you with possible solutions.

Thank you for your time and understanding.

Stay safe and healthy. Have a good day!

Sincerely,

Libeamlak | Microsoft Community Moderator

Answer 3

• May I please double confirm if you are using Exchange on-premises, Exchange Hybrid or Exchange Online environment?

Yes, we use Exchange Online

• If you are using Exchange Online, may I please confirm if you checked if the room mailbox in question is listed in the deleted users? if you haven't check it yet, please kindly go to Microsoft 365 admin center -->Users -->Deleted Users.
• If the room mailbox in question is listed in the deleted users, please kindly go to Azure active directory (https://entra.microsoft.com/)-->Users -->Deleted users -->select the room mailbox -->Delete permanently. See the screenshot below.

Exactly. I have removed the user from Deleted Users and waited for 12 hours still it's not possible to create a User/Mailbox/Workspace on the other tenant.

Answer 4

Dear Thomas Doczkal,

Good day! Thank you for posting to Microsoft Community. We are happy to assist you.

As per the description you have shared, we understand that you have a concern with removing a mailbox.

To better understand the issue and provide possible solution, we need more details from you, please kindly provide us the following information. Thanks in advance!

• May I please double confirm if you are using Exchange on-premises, Exchange Hybrid or Exchange Online environment?
• If you are using Exchange Online, may I please confirm if you checked if the room mailbox in question is listed in the deleted users? if you haven't check it yet, please kindly go to Microsoft 365 admin center -->Users -->Deleted Users.
• If the room mailbox in question is listed in the deleted users, please kindly go to Azure active directory (https://entra.microsoft.com/)-->Users -->Deleted users -->select the room mailbox -->Delete permanently. See the screenshot below.

We look forward to your response. Kindly note that the above requested information is required for further analysis and troubleshooting of your situation. Your patience and cooperation are much appreciated.

Thank you for your precious time. Have a nice day.

Sincerely,

Libeamlak | Microsoft Community Moderator