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MeetBhatt-9179 asked ChelseaWu-MSFT commented

How to share one SharePoint tenant's all site collections with another SharePoint tenant's user?

Hello Everyone,

I have two different SharePoint tenants. I need to share all site collections of first tenant with another SharePoint tenant's user.

For example, i have two different tenants like tenant1.sharepoint.com and tenant2.sharepoint.com. Now, under tenant1 there are many site collections that i need to share with tenant2 user.

Can anyone help me for the same?

Thanks in Advance.

Regards,
Meet Bhatt

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ChelseaWu-MSFT answered ChelseaWu-MSFT commented

There are a couple of options based on your need:

  1. If we are talking about basic sharing and granting access (one-way), you can invite the users from Tenant 2 by using External Sharing feature.
    Guest user accounts will be automatically created in Tenant 1 once they accept the invitation. After that, you can give them access to the sites by granting permission to the guest user accounts.
    Reference: Collaborate with guests in a site.

  2. If you need to do further collaboration between the two tenants, you can refer to the document here for more information on Microsoft 365 inter-tenant collaboration.

  3. Another option for collaboration is to create a B2B extranet and put all the contents you want to share in that site. The contents will be kept in one place and the users from Tenant 2 will not have access to other locations in Tenant 1 except for this site.
    Another post for detailed introduction: Sharing SharePoint site between Office 365 tenants.


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