HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\MSIPC\RMSOServerVerification HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSIPC\RMSOServerVerification Locate and then select one of the following subkeys, depending on your version of Office and Windows:
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In Windows 8 or Windows 8.1, move the mouse pointer to the upper-right corner, select Search, type **regedit **in the search box, and then select regedit.exe in the search results.In Windows 7, click Start, enter regedit in the Search programs and files box, and then click regedit.exe in the search results.In Windows 10, go to Start, enter **regedit **in the **Search **box, and then select regedit.exe in the search results.Setting this registry key does not affect the primary security validation (whether the Azure RMS server's certificate is valid, expired, and chained to a trusted root).Setting this registry key disables the additional security validation that makes sure that the Azure RMS server's certificate is chained to the Microsoft Trusted Root Certificate.Before you modify it, back up the registry for restoration in case problems occur. Serious problems might occur if you modify the registry incorrectly. Important Follow the steps in this section carefully. To work around this issue, temporarily disable Azure RMS server certification validation by configuring a registry key as follows. This issue is fixed in the following updates: If Windows is configured to use a proxy server for HTTPS connections, this validation process may fail and cause Office applications to crash. Windows verifies that the data sent by the Azure RMS service is valid and is coming from RMS. In this situation, the relevant Office application crashes. Sign in to an Office 2016 or Office 2013 application.Try to protect a document or email message by using IRM.Open an information rights management (IRM)–protected document or email message.Start an Office 2016 or Office 2013 application.