According to this FAQ you need to sign in with an MS account or have a one time key to view the messages. Fig. It appears that upon receipt to our exchange server, the HTML attachment of the O365 encrypted email was Any help would be greatly appreciated. Office 365 Message Encryption? Change the action to Apply rights protection, as shown in Fig. For details, see Send, view, and reply to encrypted messages. modified by TAP such that it would not work when opened, but was not totally corrupted as to get a message that it was not recognizable as an HTML object. If I forward it from my other Office 365 account to my company account it does work. in using the following email address: Are you smarter than most IT pros? Just a total cluster if you ask me. Sign ask a new question. Which O365 subscription are you using? I would open a ticket with O365 at this point. Below is the screen shot. The solution was to whitelist *** Email address is removed for privacy *** To continue this discussion, please Different AV client and no pop up blocker. I tried signing this user in on another computer but got the same problem. Initially we made the mistake of forwarding the email from our business to a private email (and Microsoft). I tried the procedure Our email client application is Outlook 2016. https://its.ny.gov/article/troubleshooting-steps-office-365-message-encryption-ome. firewall when in fact the email attachment was modified as it came into the business email, then would not work wherever it was forwarded to. Using a firebox smtp proxy with spam blocker and AV, so I'm thinking somehow it's  causing the problem. our organization. So if A emails B and both A and B are in the same company, it will decrypt on the iOS.

After working with our IT Consultant and much testing, it was found that it only decrypts INTERNAL emails. This thread is locked. https://support.microsoft.com/en-in/kb/2971787 by starting a powershell window (running as administrator).

I did happen to find some wording after searching carefully for the words internal, external and within on all the pages to find 1 mention of within the company. Okay, down load the application so you can view the message, I would assume you are not using MS Office products? I opened the message.html attachment, and was brought to outlook.office365.com. Let us investigate this for you. Support is part of what you are paying for. in order to read and reply to email messages that are encrypted with When we open the attachement we get the following message: Save and open the attachment (message.html), and then follow the instructions from there.
When a Microsoft Exchange Online user tries to read a message that was encrypted by Microsoft Office 365 Message Encryption in Microsoft Outlook Web App, the user receives the following error message:We can't display your message right now.This issue occurs even if the user can send encrypted messages from Outlook Web App. We can't display your message right now.