RMS label is not authenticating for pdf

Hello!

I hope you are doing well, and we apologize for the delayed response and the trouble.

If your PDFs with RMS labels applied via Microsoft Purview (MIP) are not authenticating in Adobe Acrobat Reader, here are a few important things to check and steps you can follow:

1. Ensure MIP Plugin is Installed

Acrobat Reader requires the Microsoft Information Protection (MIP) plugin to open and authenticate RMS-protected PDFs.

• You can download it from Microsoft: https://adobe.ly/4jRXQz5

Use Supported Versions

• Ensure you're using the latest version of Acrobat Reader: 25.001.20474 (Win) | 25.001.20476 (Mac), Apr 28, 2025. Check for any pending updates from the Menu > Help> Check for Updates, install the updates, restart the app and the machine, and try again.

• Check that your version of Windows and browser (if involved in auth) are fully updated.

• RMS-protected PDFs are not supported in browser preview mode — open them directly in Acrobat Reader.

Check Label Configuration in MIP

• Make sure the label applied in the Purview compliance portal includes permissions that are supported by Acrobat.

• Acrobat supports user-defined permissions. Ensure the policy is not restricted to Outlook or Office-only applications.

Sign In With the Correct Identity

• Open Acrobat Reader.

• Go to Menu > Help > Sign In or Account.

• Make sure you're signed in with the same Microsoft 365 account that has rights to access the labelled PDF.

See these Adobe articles for more information and suggestions: https://adobe.ly/4md6Xw3

https://adobe.ly/4j63JaR

Let us know how it goes.

Thanks,

Anand Sri.