Accelerite is happy to announce that you can acquire and deploy patches for Win10 1803 branch from all the supported versions of Radia.
The KB* & Win10* based acquisition will acquire 1803 branch updates also. The same KB articles can be entitled to the end points once the acquisition is complete.
We’re currently testing the wrapper policy for 1803, and we’ll further communicate as soon as we complete our tests.
 

Update:
Please follow the link for hotfix details https://support.accelerite.com/hc/en-us/articles/360007162752-Windows-10-1803-upgrade