The “Microsoft Outlook was not able to create a message with restricted permission” error can be frustrating when trying to send encrypted emails. This issue often stems from recent changes in Microsoft Office’s encryption protocols. Let’s explore several methods to fix this problem and get your secure messaging back on track.
Method 1: Revert to Previous Encryption Protocol
Microsoft’s switch from MSIPC to MIP SDK in recent Outlook versions may be causing this error. Here’s how to temporarily revert to the older protocol:
Step 1: Open the Registry Editor by pressing Win + R, typing regedit, and pressing Enter.
Step 2: Navigate to HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Common\DRM.
Step 3: Right-click in the right pane, select New > DWORD (32-bit) Value, and name it “PreferredRmsPackage”.
Step 4: Double-click the new value, set its data to 1, and click OK.
Step 5: Restart Outlook and try sending an encrypted message.
This change instructs Outlook to use the older MSIPC protocol, which may resolve the error.
Method 2: Use Outlook Web Access (OWA)
If the desktop app is causing issues, try using Outlook Web Access as a temporary workaround:
Step 1: Go to outlook.office.com and sign in with your account.
Step 2: Compose a new email and look for the encryption options in the message toolbar.
Step 3: Send your encrypted message using OWA’s interface.
This method bypasses potential issues with the desktop Outlook client.
Method 3: Enable IRM for Outlook Web
If encryption options are missing in OWA, you may need to enable Information Rights Management (IRM):
Step 1: Access the Microsoft 365 admin center and ensure Rights Management Service (RMS) is activated.
Step 2: In the SharePoint admin center, go to Settings > Classic settings page.
Step 3: Under Information Rights Management (IRM), select “Use the IRM service specified in your configuration”.
Step 4: Click “Refresh IRM Settings”.
Step 5: In OWA, users should now see encryption options when composing messages.
Method 4: Clear Outlook Cache
Corrupted cache files can cause various Outlook issues, including encryption errors:
Step 1: Close Outlook completely.
Step 2: Press Win + R, type %LOCALAPPDATA%\Microsoft\Outlook\, and press Enter.
Step 3: Open the RoamCache folder and delete all its contents.
Step 4: Restart your computer and open Outlook to test encryption.
Method 5: Disable Add-ins in Safe Mode
Conflicting add-ins can interfere with Outlook’s encryption functionality:
Step 1: Press Win + R, type outlook.exe /safe, and press Enter to launch Outlook in Safe Mode.
Step 2: Go to File > Options > Add-ins.
Step 3: At the bottom, select “COM Add-ins” from the Manage dropdown and click Go.
Step 4: Uncheck all add-ins and click OK.
Step 5: Restart Outlook normally and test encryption.
If encryption works, re-enable add-ins one by one to identify the problematic one.
Method 6: Revert Outlook to a Previous Version
As a last resort, you can roll back Outlook to a version known to work with encryption:
Step 1: Open Command Prompt as administrator.
Step 2: Copy and paste the following commands, pressing Enter after each:
cd %programfiles%\Common Files\Microsoft Shared\ClickToRun
officec2rclient.exe /update user updatetoversion=16.0.17231.20236
Step 3: Wait for the process to complete, then restart your computer.
Step 4: Open Outlook and test encryption functionality.
Remember to check for updates regularly, as Microsoft may release a fix for this issue in future versions.
By following these methods, you should be able to resolve the “Microsoft Outlook was not able to create a message with restricted permission” error. If problems persist, contact your IT department or Microsoft Support for further assistance. Keep your Outlook updated to benefit from the latest security features and bug fixes.