I've got some existing lists that have custom content types inherited from the Document content type. I've activated the Document ID Service feature, and any new lists I create using the same content type are working just fine.
But it's the items in existing lists that won't take the Document ID. Other things I've tried:
Running the Document ID Assignment job
Ran Gary Lapointe's propagate Content Type command:
which after adding some debugging I'm seeing that when searching for the Content Type in use:
IList<SPContentTypeUsage> ctUsageList = SPContentTypeUsage.GetUsages(sourceCT);
I'm getting a count of 0, although every item in the list is set to that Content Type.
Anyone seen anything like this or run into similar issues?