We can’t add SharePoint subsite document libraries in the latest Adobe Reader. Top‑level sites work, but subsites return ‘access denied’ despite correct permissions. Others report this issue since around Aug 2025. Any solution?

see my response as per your requirement 

Exact adobe Acrobat/Reader version : 2026.002.21901 64bit

Windows version : win 10(22h2) 64bit and win 11(25h2) 64bit

tenant.sharepoint.com/sites/Moff/Dcoument_library → works
tenant.sharepoint.com/sites/Moff/itch/document_library → fails

I am also facing same issue and i have opened support ticket in Microsoft support. but as per Microsoft support issue is from Adobe side

Hello Rahi,

Thank you for your time on today's call.

As discussed, we tested the behavior by signing in with a Global Administrator account in an InPrivate/Incognito browser session and reviewed the Microsoft Entra sign-in logs. During our investigation, we observed that the sign-ins were successful and no Conditional Access policies were applied during the authentication flow. We also confirmed that the issue occurs when attempting to add SharePoint subsites within Adobe Acrobat, while access to the main SharePoint sites works as expected.

Based on our findings, this behavior does not appear to be related to Microsoft Entra authentication or Conditional Access, as the authentication requests are completing successfully. We discussed that the issue may be related to Adobe Acrobat's handling of SharePoint subsites, a product limitation, or application-specific behavior within Adobe.

After reviewing the findings with my Technical Advisor, it was confirmed that the issue is not from Entra end but from Adobe application end. So please find this as justification for engaging Adobe Support so that you can raise a support request with their team for further investigation.

Please let me know if you have any questions in the meantime.

HI ​@dekidejan,

Chiming in to see if things are working fine for you.

If not, please share the details with us as mentioned above for further investigation.

Regards,

Souvik

Hi @dekidejan,

Hope you are doing well. Sorry for the trouble with using Sharepoint with Acrobat.

Adobe introduced modern OAuth-based SharePoint integration starting Aug 2025. This rollout is still phased and inconsistent, and does not handle all SharePoint URL types equally.

More info here: Access your SharePoint files in Acrobat, Acrobat Reader

• As a result:

  • Top-level site collections work

  • Subsites / nested document libraries often fail with “Access Denied”

Additionally, Acrobat requires exact document library URLs + proper app permissions, not just site-level access. Even with correct user permissions, the integration can fail due to authentication scope or API limitations, not SharePoint permissions. More info: Adding SharePoint site as Adobe Acrobat storage fails - Microsoft Q&A

This is what you can try:

Grant Admin Consent in Azure (critical for subsites)

Subsites often fail because API permissions are not fully granted. Steps:

1. Go to Azure Portal > Entra ID > Enterprise Applications

2. Search for Adobe Acrobat / Adobe Document Cloud

3. Open > Permissions

4. Click Grant Admin Consent

Without this, Acrobat may authenticate but still fail to access deeper site structures.

Hope this gives some clarity.

Regards,
Souvik