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RLBChrisBriant
Asked: 2021-04-12 22:28:13 +0800 CST

Office365 Guest Access to Shared Mailbox

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Is it possible for a guest account that exists on 365 to have access to a shared mailbox? Can this be done using B2B collaboration?

I have am unable to find an exact answer from the Microsoft docs on this.

office365

1 Answers

  1. Best Answer

    It's not possible.

    The permissions can be set up only within the current organization tenant. It is not possible to set up mailbox permissions with out of tenant users

    Source: Microsoft Docs

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