While working in ArcGIS Pro offline I changed my Windows password, which orphaned my Pro user license. ArcGIS Pro login would not accept my new password. Therefore, I was unable to log in to ArcGIS Online and set Pro to online mode. Admin users saw the license as disconnected under licensing activities. We called Esri and received a case number, then Esri reset my license the next business day. It would be helpful if there was a pop-up from Windows or Pro warning users not to change Windows credentials while pro is in offline mode. Esri should add documentation indicating this potential problem.