Please post a screenshot of the Lightroom Import Panel showing the Olympus images (Grayed out or unable to import).
Also mention exact Lightroom version and Camera model in use.
Thanks for your prompt reply. It seems I was lying about the old files, I just wasn't patient enough and they have started appearing.
Here's a screenshot of my catalogue with the corresponding folder list. I've highlighted the folders that won't sync. I've also included the import screen where ALL files are greyed out. It also looks like my NEF files aren't going across from these particular files either which I didn't realise.
Version = Lightroom v 5.6
Could you ensure that you have Read/Write Access of the Parent Folder 2016
Make sure that username is also included in the Sharing and permissions list
Also update Lightroom to version 5.7.1
I've upgraded to Lightroom 5.7.1. I've also checked permissions and I have read/write from top to bottom. I've tried creating a new folder in lightroom and moving the pics and then synching but no luck. The photos that are appearing in my folder list won't move over to Lightroom. If it were all, it might be easier, but it seems to be a random selection (2 different file types from 2 different cameras, both of which are supported)
Files already imported into LR will be greyed out if you try to import them, again. To confirm this is the issue, temporarily uncheck Don't Import Suspected Duplicates at the right of the Import panel and see if the photos become active. If so then they are duplicates of photos already in the catalog somewhere else. Since you've just moved your photos to a new location perhaps some got left behind somewhere else that's not obvious. You should be able to do a Text search in the Filter bar (use \ to bring it up) in Library for the filename of the missing photos to find where LR still thinks they are in your catalog.
DO NOT IMPORT THEM AGAIN with Don't Import Suspected Duplicates disabled. The way to fix things is re-enable Don't Import Suspected Duplicates, cancel the Import, find the photos in your catalog using a text search, right-click on them and choose Locate Missing Photo and click over to the new location.
Thank you. I managed to locate the files and then I moved them using lightroom to where I wanted them to be. Worked a treat