At Ignite we announced a major improvement to the way secure external sharing of files and folders works in both OneDrive and SharePoint in Office 365 and we wanted to share what this means for users...
Updated Jun 25, 2020
Version 4.0
Blog Post
Like this new process, but we have a constant problem with the Verifications Codes always getting sent to user's Junk Email folders. This happens even for "external" users that are also Office 365 users (in other tenants) or Outlook.com users. Can there be something done with these verification emails so that they are properly whitelisted across Microsoft's systems? It's very confusing for users that they are able to successfully receive the Sharing Invitation, then request the code and then it appears nothing happens, only to later find it in their Junk Email. Why can the initial email get through, but the code can't? Can these codes get generated and sent impersonating the original user that sent the sharing request instead of the generic no-reply@sharepointonline.com address? This would likely help the problem and also assist user's in making decisions that this was the same workflow underway.