Note: My SharePoint tenant is locked down and we don't have access to deploy apps and all development must lean OTB.
I'm building a solution where I need to have more than one edit form on a list of items. I've completed the process on four other lists but two of my lists have over 5000 items in them. Usually, I can browse, in SPD, from All Files > Lists > MyList : and see all the forms and views for that list. Then I can copy/paste an existing form to manipulate, give it a new name, and do the work I need to do. However, when I browse to one of the large list to see the files, SPD give me the list view threshold server error message.
Ok, fine, so I browse through Windows Explorer to the same location, but the folder appears to be empty, no files. If I paste a file there, it doesn't show when I refresh. I assume it simple failed without notification.
Fine! So I go back to SPD, and navigate through Lists and Libraries > MyList > Forms : and click the Edit Form button to create a new edit form. I get the dialog, complete the info, press ok, and I get the message "Could not save the list changes to the server."
So how can i create a new Edit Form for my list with over 5000 items? Is there any work around for this?