Joining a multiplayer world / server may result in the following error messages appearing:
You need to authenticate to Microsoft services
Xbox auth expired, please join again
Please log in to Xbox to join this server
Sorry, we couldn’t validate your login
Linked issues
is duplicated by 13
8 more links
Please note issues like this can sometimes be caused by a temporary service outage.
As a potential workaround for the issue, you might like to check that your date and time setting is up to date and synced on your device.