Usually Xrm.Internal.openDialog method is used to open dialog for earlier version of CRM. But it seems, for newer release Dynamics 365, it is not working properly.
I tried to open HTML page( written in Bootstrap framework) using this method in chrome. Page was not behaving as expected.
Any alternative method or way to open dialog similar to OOB lookup dialog?
Any help will be really appreciated!!
Note: Xrm.Internal.openDialog method is unsupported