Office 365: Finally Document ID service works is expected.
Fixed! It looks like Microsoft, at some point this year, fixed a bunch of stuff with DocumentIDs. For the first time ever Microsoft provides a consistent cornerstone of Document Mmgt. Summary: Document identifiers now persist with the document across Office 365. Search works, with appropriate guidance on using criteria correctly. Configurable numbering format expanded and automatically generated numbering doesn't (seem) to duplicate anymore. Direct document Identifier links w