Forum Discussion
Document in "Read-only" mode all the time
Hi, I know this problem from a SharePoint 2016 on Prem environment.
Temporarily (at our environment) the problem can be solved by completely resetting the Internet Explorer settings (important when resetting - select the check box "Delete personal settings").
Unfortunately I haven't found a reason for this yet. I can exclude OneDrive from my list because it affects users who have not even configured it. My previous assumption was that the whole thing happens when users jump back and forth between different WIFIs (it usually hits users who don't have a fixed workstation).
And there is something else. The SharePoint can be reached via https as well as via http (https is the default). If the problem occurs and the user opens the document with http instead of https, the user can edit the document again.
after looking at the network communication protocol I see only one difference between a client where is working and where is working not. at the client where the documents are only opened read-only/write protected I see that the _vti_bin/cellstorage.svc/CellStorageService is never called there. I think this is because a HTTP OPTIONS was send from word/excel to the lib before and HTTP 401 was returned.