We agree and would love to see how many votes this gets.StephenOn3rdRock commented
Workaround= create "dummy" onedrive account to give to people with whom you want to share yoru photos. Obviously not ideal to share an account, so the faster OneDrive pull their finger out the better!StephenOn3rdRock supported this idea ·StephenOn3rdRock commented
2020Jan8 update. I agree! Search-by-tag should be available to shared users *without" them having to login to onedrive. But it still does not seem available (after 3yrs since comments below).