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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.

RLBChrisBriant
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1 Answers1

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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

J-M
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