2 answers
Hi,
To create lookup input field in lightning we have to create custom lightning component.Please refer below links which might help you with thishttp://www.jitendrazaa.com/blog/salesforce/lookup-component-in-salesforce-lightning/http://sfdcmonkey.com/2017/07/17/re-usable-custom-lookup/https://developer.salesforce.com/blogs/developer-relations/2015/06/salesforce-lightning-inputlookup-missing-component.htmlHere is an idea to vote on thishttps://success.salesforce.com/ideaView?id=08730000000Dom1AACHope this helps youIf this helps kindly mark it as solved so that it may help others in future.Thanks and Regards