Existing external users could not be re-added to shares after 23.262.1.33992 upgrade

Original Question or Issue:

Existing external users could not be re-added to old or new shares after 23.262.1.3392 FileCloud upgrade and received “User is already added to share,” while newly invited users are working.

Environment:

• Product - FileCloud Server
• Version - 
• Platform - Windows, Linux, MacOS

Steps to Reproduce:

Error or Log Message:

“User is already added to share”

Defect or Enhancement Number:

 FCL-10419 

Cause:

This is a bug introduced in FileCloud 23.262.x and will be fixed in FileCloud 23.264. The issue specificly happens when Settings>Misc>User> Account search is set to "Exact Email Search with Implicit Account Invite" 

Resolution or Workaround:

Change the Settings>Misc>User> Account search mode to "Partial names/Email Search"  

Notes: