B2B integration limitations with O365

[Stuart Galloway]

Hi.  I have seen information on B2B Guest integration capabilities & restrictions with SharePoint, OneDrive and Teams.

Just wondering what is the current scope of integration and/or restrictions with other O365 components, in particular Exchange.

For example, can a guest user be added to a shared mailbox and send from it?

Similarly, can I delegate calendar management to a guest user?

Cheers, Stuart

[#2]

Hi,
This is very good question! Did you get answer to it?
From my colleges I understood it is doable with the Shared Mailboxes. But I didn't get any proof yet unfortunately yet.

Also I am not sure about the rest and features like Calendar Sharing or Teams

Regards,
Kon

[#3]

Hi Stuart,

Keen to know if you were able to proceed with providing guest user access to EOL Shared mailbox. I am considering a similar solution for my org but not sure whether it would work and more specifically its limitations.

Cheers,

Gokul