Hello !! When I migrate , users ldap when logging in generates the following error:
Internal Server Error
The server encountered an internal error and was unable to complete your request.
Please contact the server administrator if this error reappears multiple times, please include the technical details below in your report.
More details can be found in the server log.
And those user what not login, ldap does not recognize them and rejects access
hi @claerso welcome to the forum 
you are missing the required support template. Please fill this form out and edit into your post. This will give us the technical info and logs needed to help you in case the machine in question in spitting out errors! Since you’ve provided zero technical details it is impossible to help you as-is. Thanks.
Please use the search - lot of issues have been discussed already. you’ll easily find many hints following owncloud tag.
Sorry, I don’t understand what form you’re talking about.
You should click on the provided “required support template” link and use it to provide requested information.