Core problem that Tier 1 & Tier 2 could not fix. Needs solution.

"Customize Quick Access Toolbar" updates are blocked by the message "The server drafts location you entered for offline editing is not valid or you do not have permission to access that location. Specify a location on your local computer."  The user is also blocked from entering any data into the "Server drafts location" (MS Word/Options/Save/Server drafts location).  Microsoft Tier 1 and Microsoft Tier 2 spent about 2 hours on this with registry checks and deletions and even the complete removal of Office 365 and reinstallation.  They confirmed and reconfirmed the problem.  They could not fix it.  I have an electronic file of the chat session, if needed.

Tier 2 said that an internal escalation to Tier 3 is not possible though Tier 1 to Tier 2 did happen without fanfare.  This input to the Tech Community was the only escalation method.  So here it is.  Microsoft sold a product that currently does not work as it has in the past.  The problem has appeared on Word & Excel (may happen on other applications as well).  Please fix this.  Thank you.