Forum Discussion
External people can't open files with Sensitivity Label encryption.
That was my original expectation of how it should work too, but all the reading I've done since has suggested that the recipient either needs to be a Guest in your tenant, or a B2B trust relationship needs to be setup between the tenants for it to work. Could you just confirm there are no trust relationships between the two tenants you tested on, and that the recipient isn't a Guest in the host tenant please?
I tested again with a brand-new account that is absolutely not a guest in my tenant... and the message showed up just fine. I'll try with another account in a tenant that I don't own to see what happens there.
Thanks for your help with this Tony, it's very kind of you. You'll see from others commenting on this thread that their understanding / experience is the same as mine (i.e. that external people need to be a Guest / B2B Direct Connect needs to be setup for them to be able to open encrypted documents attached to emails).
I've spun up an MDX Purview tenant to send myself some labelled documents to see what the experience is there. The confusion continues!!!!