Follow the the steps below to clear the share entry (If you are not experienced with SQL database edits or you don’t understand why this edit is being done, please contact Veeam support). After executing the query below when viewing the properties of an existing job or creating a new job you will be prompted for the share credentials.
delete from [backup.model.mrulist] where url = ‘<share path>’
For information on how to apply SQL scripts please review https://www.veeam.com/kb1443. You may also run a SQL script from SQL Server Management Studio, right click on your database and choose the “New query” option, insert the text from the file, and click Execute.