Comments on: Pros and Cons of Single Tenant vs Multiple Tenants in Office 365 https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/ Create IT blogger community Wed, 18 Feb 2026 10:42:16 +0000 hourly 1 https://wordpress.org/?v=6.9.1 By: Miguel Isidoro https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-85668 Wed, 18 Feb 2026 10:42:16 +0000 https://blogit.create.pt/?p=8352#comment-85668 In reply to Prince Dodangeh.

Hi Prince,

First of all, sorry for the late response.
A single tenant in Microsoft 365 supports several domains. In my company, we have several domains for each of the sub-companies and all are in the same tenant. SharePoint permissions will take of secure access to SharePoint resources. Here, we use Exchange Online, and mailboxes and shared mailboxes are created in the same instance of Exchange Online in our single tenant.
You don’t have to create a separate tenant for this unless you want a higher degree of isolation between the two companies.

Hope it helps,
Miguel

]]> By: Prince Dodangeh https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-68043 Thu, 05 Dec 2024 14:35:33 +0000 https://blogit.create.pt/?p=8352#comment-68043 Oh dear Miguel,

Such a fantastic post! Recently, my company bought a new company. Our domain is domaina.com, and we have a tenant in 365 with hybrid Entra join. We bought a company with domainb.com and only one IMAP server for email. What is your best practice for sharing resources like Teams, SharePoint, shared mailboxes, and all of them with the new company?
Please give me your best practice.

]]> By: Miguel Isidoro https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-57954 Mon, 23 Oct 2023 19:54:32 +0000 https://blogit.create.pt/?p=8352#comment-57954 In reply to Jorge Antunes.

Hello Jorge,

You are right. Why are using 2 tenants? Wouldn’t it be easier to have a single tenant?

Thanks,
Miguel

]]> By: Jorge Antunes https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-56395 Wed, 09 Aug 2023 10:30:57 +0000 https://blogit.create.pt/?p=8352#comment-56395 Greetings Miguel,

I have a question about ALIAS/Domain. We own two O365 tennants. The higher ups asked if in the main tennnat i could give an alias from the second tennat to the mailbox of the users the Main O365. From my experience we can only do that if we add the domain of the second tennat to the main Tenant. Since it is already resgistred in an O365 this won´t work. Am i Wrong? Or is there another way to do this?

The main O365 has 10 users and the other has 5 users.

]]> By: Miguel Isidoro https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-54787 Tue, 16 May 2023 09:50:53 +0000 https://blogit.create.pt/?p=8352#comment-54787 In reply to Brian.

Hello Brian,

I am glad that this post somehow helped you.
About your question, I believe you can’t. I found out that you can share billing with other tenants (https://learn.microsoft.com/en-us/microsoft-365/commerce/billing-and-payments/manage-multi-tenant-billing?view=o365-worldwide) but it is not what you need.

Thanks,
Miguel Isidoro

]]> By: Brian https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-53614 Mon, 13 Mar 2023 20:25:10 +0000 https://blogit.create.pt/?p=8352#comment-53614 Hello from 2023. What I would have given to come across this a few months ago. Microsoft is great at “Death by Options”. We have recently been acquired and are merging the parent company into our org. I first started to set everything up into different tenants and it’s been a nightmare trying to get everyone synced.

Is there a way to setup two different billings for a single Office tenant? Google searches are not pointing me in the right direction.

]]> By: Miguel Isidoro https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-48989 Tue, 27 Sep 2022 09:18:09 +0000 https://blogit.create.pt/?p=8352#comment-48989 In reply to Dave Simmons.

Hello Dave,

Thanks for the thoughts. Device management was not the focus of this post.

Thanks.
Miguel Isidoro

]]> By: Dave Simmons https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-47287 Wed, 27 Jul 2022 18:51:10 +0000 https://blogit.create.pt/?p=8352#comment-47287 Nice article. One point I don’t see mentioned is device management. We wanted to do a trial of Intune on just a couple of users and devices, but as far as I can tell Intune forces you to switch all users – all devices in the tenant to having intune as the MDM. We are already using the Office365 MDM so that is not practical. It seems you must use multiple tenants to have different (Microsoft) MDMs.

]]> By: Miguel Isidoro https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-43590 Thu, 28 Apr 2022 21:34:49 +0000 https://blogit.create.pt/?p=8352#comment-43590 In reply to Chintan Desai.

Hello Chintan,

Thank you for your feedback.
I am glad it helped!

Thanks
Miguel

]]> By: Chintan Desai https://blogit.create.pt/miguelisidoro/2019/01/07/pros-and-cons-of-single-tenant-vs-multiple-tenants-in-office-365/#comment-43558 Thu, 28 Apr 2022 06:12:38 +0000 https://blogit.create.pt/?p=8352#comment-43558 Wonderful Article. Thank you so much!!!

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