Hello @TomJebo-9587
We were able to achieve this with your suggestion dated February 04, for using IT Hit WebDav for sharing cookies with MS Word to bypass additional authentication.
I am not sure I understood your reply correctly, but we need to integrate this functionality with Office Online's Edit in Local App option so that the communication between IT Hit WebDav and MS Word(suggested by you and @emilyhua-msft ) is established once user clicks on Edit in Local App in Office Online.
Thanks,
Varun
Hi @TomJebo-9587 ,
Your understanding is absolutely correct we have an on-premises deployment of Office Online Server.
Thanks,
Varun
This is correct. We show document list after authentication from our website and we need to pass the cookie or tell MS Word not to authenticate again as the users were already logged in through our website.
Thanks,
Varun
Thanks for your reply @TomJebo-9587 .
I have gone through the solution @emilyhua-msft suggested.
But its not explained that how can we integrate it with Office Online Browser's "Edit in Word" option.
Out WOPI host sends out WebDav url to the document as ClientUrl in CheckFileInfo and we see this option "Edit in Word".
What else we can do to integrate it?
Thanks in Advance,
Varun
I opened the website for directory browsing as suggested. The result is still same as previous one.

t keeps asking for user creds with https even entering right creds.
There is some confusion. I am not trying IE or any browser.
As previously mentioned, I am trying to create mapped folder with the url in file explorer in the same server where I get the authentication popup . 
If I open any document in MS Word document through URL in MS Word it gives me to "UPLOAD FAILED You are required to sign in to upload your changes to this location." If I try to sign in nothing happens.
UPDATE: I am able to create the mapped folder from outside the server, authenticate with administrator's password and write to it, but when I open the word document it gives error - "UPLOAD FAILED You are required to sign in to upload your changes to this location." Is there any way to get rid of authentication popup for now so that it can be mapped directly without supplying userid/password and able to save the document in MS Word.
I have one more question how can I check WebDav supports class2 or not?
Thanks,
Varun
Hello @BruceZhang-MSFT
Can we have some kind of working session where I can present the issue that might be quick to resolve it?
Thanks,
Varun
Hello,
It has valid certificate issued to the domain name:
I am trying to map via domain name not the IP address and I get authentication popup again and again.
I tried command line as well.
You can dig-in further: https://devdocmgt.pahub.com/
Hello,
If you look at the site its created in IIS with name - "devTXTControl". The certificate is assigned to this site. The url is: https://devdocmgt.pahub.com/
I will copy the applicationHost file in the "answer" to this as it doesn't allow me to upload txt/xml file and also it exceeds 1600 characters if I copy here.
I have added a default page without changing any settings so that it doesn't give any error, but the results for the mapping the drive are same.

Thanks.
Hello,
Thanks for coming back to me so quickly.
I tried the above steps:
1) Added URL Authorization feature and rule at server level.
![158641-image.png][2]
2) Changed "Allow anonymous property queries" property to false at server and site level.


But still I am getting issues in writing anything to that mapped folder: [2]: /answers/storage/attachments/158641-image.png
I disconnect and again created mapped drive.
It was able to disconnect and reconnect with http site and write to it and as you said it asked for creds again, but our main site with https it was not even able to reconnect after entering the correct same user creds. It keeps asking for user creds with https even entering right creds.
Thanks,
Varun
Just wondering if my question is lost without any answers.
Please confirm.
Thanks,
Varun