This article relates to Cloud Drive Mapper, SharePoint Online and Adobe

Normally opening PDF documents within a drive mapped by Cloud Drive Mapper is just like any other drive. 

However, we do sometimes received reports of a user opening a PDF and immediately being asked to input in their Office 365 credentials again even though they have already logged into Cloud Drive Mapper.

This appears to be linked to the "check in / check out" feature being turned on within SharePoint and a conflict that can arise between SharePoint and Adobe products. 

Our first recommendation in this scenario is to make sure the Trusted Zones include SharePoint as this can also be a cause of a similar issue.

Make sure: https://* is added to the Trusted Internet Zones (not Local Intranet)

If this problem persists, 

This is a problem with how Adobe interacts with Sharepoint and not Cloud Drive Mapper when this feature is enabled. 

It can be resolved by disabling Adobe Checking/Check out feature.

To do this go to Regedit and input: 

Regedit :-     HKLM\SOFTWARE\Policies\Adobe\(productname)\(version)\FeatureLockDown

New Key :-                     cSharePoint

New DWORD Value :-    bDisableSharePointFeatures

Set Value :-                    1

The Adobe forums have some articles / that cover these issues for further information. 

If you need any assistance please do not hesitate to contact us at