@Stef A board not found message would be expected when accessing that board from a private window, because you're not logged into an account that's permitted to view it.
As @Iain Dooley mentioned, if a member invites you to their private board, you'll be permitted to see its content from the invite link.
I tested this with a team member to verify and the behavior works one of two ways:
Let me know if that helps clarify!
Thanks for looking into this further, @Garrett ! Since I've always had a Trello account I've never encountered this behavior where I could see a private board even while logged out. Do you know the reasoning behind hiding the private board if you have an existing account vs. displaying a preview if you're new to Trello? I'm curious why it's designed this way.
Of course Stephanie,
When you invite an existing Trello user to a private board, Trello is able to add a level of verification to the invite link being sent, because there is a Trello account available to verify. You can actually see this in the board URL provided in the email invite, which will require a confirmation token from the invited member's ID, or in other words, they need to be logged in.
When an invite is sent to a user with no existing Trello account, there isn't a way to verify that by being logged in. Instead, a virtual account is created as a placeholder and the invitee can preview that board. If they do plan to collaborate on that board, they can register a new account which replaces the virtual one.
While I'm not 100% sure why the preview exists, my thinking is it would be to allow new users to at least verify the board they're being invited to, before registering a new account. If an already existing user is invited to a board accidentally, they can simply leave the board. If a user without an account is invited to a board, they may be hesitant to register an account if they don't know what the board is for.
Allowing a read only preview can let the new user verify the board they are invited to is one they want to work on then register an account.
Sorry for the wall of text, but let me know if you feel that makes sense!
If you had to thrive a new habit during a lockdown, what would it be? Trello
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